MathBrush

Revision list

Every problem, by topic, easiest first, so you can work down a topic rather than pick at random. Tick them off as you go — the ticks stay in this browser. The problems page is the same solutions grouped by the pattern each one teaches, which is the better way in if you are choosing what to learn next; this is the better one to print.

The 33 problem patterns

All 33 patterns, one to a page — the 19 behind Primary 5 and 6 word problems, and the skills the younger years are built on. The bar model, how to spot it in the question, and the mistake children make. A booklet you can print. Free.

A PDF, and a note when new solutions go up.

Whole Numbers 259

  1. A tank of oil — morning and afternoon Standard · Working backwards
  2. add decimals Standard · Decimals and percentages
  3. add decimals Standard · Decimals and percentages
  4. add in columns Standard · Units and parts
  5. add in columns Standard · Units and parts
  6. add money amounts Standard · Decimals and percentages
  7. add money amounts Standard · Decimals and percentages
  8. add several single-digit numbers Standard · Units and parts
  9. add several single-digit numbers Standard · Units and parts
  10. add three-digit numbers Standard · Large numbers and operation order
  11. add three-digit numbers Standard · Large numbers and operation order
  12. add two-digit numbers mentally Standard · Large numbers and operation order
  13. add two-digit numbers mentally Standard · Large numbers and operation order
  14. add with a four-digit algorithm Standard · Large numbers and operation order
  15. add with a four-digit algorithm Standard · Large numbers and operation order
  16. add within 100 Standard · Units and parts
  17. add within 100 Standard · Units and parts
  18. Bicycles and tricycles — 58 wheels Standard · Suppose and swap
  19. Bus passengers — boarding, alighting, doubling Standard · Working backwards ✎ Practice
  20. Cable car — passengers double at the second station Standard · Working backwards
  21. calculate mentally Standard · Units and parts
  22. calculate mentally Standard · Units and parts
  23. calculate mentally Standard · Units and parts
  24. calculate mentally Standard · Units and parts
  25. calculate mentally Standard · Units and parts
  26. calculate mentally Standard · Units and parts
  27. calculate mentally by place value Standard · Large numbers and operation order
  28. calculate mentally by place value Standard · Large numbers and operation order
  29. calculate mentally within multiplication tables Standard · Large numbers and operation order
  30. calculate mentally within multiplication tables Standard · Large numbers and operation order
  31. calculate with brackets Standard · Large numbers and operation order
  32. calculate with brackets Standard · Large numbers and operation order
  33. calculate within multiplication tables Standard · Large numbers and operation order
  34. calculate within multiplication tables Standard · Large numbers and operation order
  35. calculate within multiplication tables Standard · Large numbers and operation order
  36. calculate within multiplication tables Standard · Large numbers and operation order
  37. calculate within multiplication tables Standard · Large numbers and operation order
  38. calculate within multiplication tables Standard · Large numbers and operation order
  39. Car park — cars and motorcycles, counting wheels Standard · Suppose and swap
  40. Chickens and cows — 32 legs Standard · Suppose and swap
  41. Class trip savings — four classmates Standard · Units and parts
  42. compare and order decimals Standard · Decimals and percentages
  43. compare and order decimals Standard · Decimals and percentages
  44. compare and order numbers Standard · Large numbers and operation order
  45. compare and order numbers Standard · Large numbers and operation order
  46. compare and order numbers Standard · Large numbers and operation order
  47. compare and order numbers Standard · Large numbers and operation order
  48. compare and order numbers Standard · Large numbers and operation order
  49. compare and order numbers Standard · Large numbers and operation order
  50. compare money amounts Standard · Decimals and percentages
  51. compare money amounts Standard · Decimals and percentages
  52. compare numbers Standard · Units and parts
  53. compare numbers Standard · Units and parts
  54. compare sizes of sets Standard · Units and parts
  55. compare sizes of sets Standard · Units and parts
  56. Concert tickets — four classes Standard · Units and parts
  57. connect addition with subtraction Standard · Units and parts
  58. connect addition with subtraction Standard · Units and parts
  59. connect factors and multiples Standard · Large numbers and operation order
  60. connect factors and multiples Standard · Large numbers and operation order
  61. connect multiplication with division Standard · Large numbers and operation order
  62. connect multiplication with division Standard · Large numbers and operation order
  63. continue a number sequence Standard · Large numbers and operation order
  64. continue a number sequence Standard · Large numbers and operation order
  65. continue a number sequence Standard · Growing patterns and tables
  66. continue a number sequence Standard · Growing patterns and tables
  67. continue a number sequence Standard · Growing patterns and tables
  68. continue a number sequence Standard · Growing patterns and tables
  69. continue a number sequence Standard · Growing patterns and tables
  70. continue a number sequence Standard · Growing patterns and tables
  71. convert a decimal to a fraction Standard · Decimals and percentages
  72. convert a decimal to a fraction Standard · Decimals and percentages
  73. convert a fraction to a decimal Standard · Decimals and percentages
  74. convert a fraction to a decimal Standard · Decimals and percentages
  75. convert dollars and cents Standard · Decimals and percentages
  76. convert dollars and cents Standard · Decimals and percentages
  77. count by hundreds and thousands Standard · Large numbers and operation order
  78. count by hundreds and thousands Standard · Large numbers and operation order
  79. count by tens and hundreds Standard · Large numbers and operation order
  80. count by tens and hundreds Standard · Large numbers and operation order
  81. count cents to one dollar Standard · Units and parts
  82. count cents to one dollar Standard · Units and parts
  83. count mixed dollars and cents Standard · Decimals and percentages
  84. count mixed dollars and cents Standard · Decimals and percentages
  85. count objects Standard · Units and parts
  86. count objects Standard · Units and parts
  87. count whole dollars Standard · Units and parts
  88. count whole dollars Standard · Units and parts
  89. Cupcakes at four stalls — Stall D's share Standard · Units and parts
  90. distinguish odd and even numbers Standard · Large numbers and operation order
  91. distinguish odd and even numbers Standard · Large numbers and operation order
  92. divide a decimal Standard · Decimals and percentages
  93. divide a decimal Standard · Decimals and percentages
  94. divide by a multiple of a power of ten Standard · Large numbers and operation order
  95. divide by a multiple of a power of ten Standard · Large numbers and operation order
  96. divide up to three digits by one digit Standard · Large numbers and operation order
  97. divide up to three digits by one digit Standard · Large numbers and operation order
  98. divide with a remainder Standard · Large numbers and operation order
  99. divide with a remainder Standard · Large numbers and operation order
  100. divide within multiplication tables Standard · Large numbers and operation order
  101. divide within multiplication tables Standard · Large numbers and operation order
  102. divide within multiplication tables Standard · Large numbers and operation order
  103. divide within multiplication tables Standard · Large numbers and operation order
  104. express whole-number division as a decimal Standard · Decimals and percentages
  105. express whole-number division as a decimal Standard · Decimals and percentages
  106. Farm animals — chickens and cows Standard · Suppose and swap ✎ Practice
  107. Files and pens — the cost of 1 pen Standard · The equal concept ✎ Practice
  108. Flags for a parade — reels of string Standard · Number × value
  109. Four boys' money — Peter's share Standard · Units and parts ✎ Practice
  110. Four volunteers collected recyclable cans for a school drive. Standard · Units and parts
  111. Four workshops used paint to decorate murals for a festival. Standard · Units and parts
  112. identify decimal place value Standard · Decimals and percentages
  113. identify decimal place value Standard · Decimals and percentages
  114. identify hundreds, tens and ones Standard · Large numbers and operation order
  115. identify hundreds, tens and ones Standard · Large numbers and operation order
  116. identify place value Standard · Large numbers and operation order
  117. identify place value Standard · Large numbers and operation order
  118. identify place value Standard · Large numbers and operation order
  119. identify place value Standard · Large numbers and operation order
  120. identify tens and ones Standard · Units and parts
  121. identify tens and ones Standard · Units and parts
  122. interpret approximate equality Standard · Large numbers and operation order
  123. interpret approximate equality Standard · Large numbers and operation order
  124. interpret operation and equality symbols Standard · Units and parts
  125. interpret operation and equality symbols Standard · Units and parts
  126. interpret the division symbol Standard · Large numbers and operation order
  127. interpret the division symbol Standard · Large numbers and operation order
  128. Ivan and Helen — half his money Standard · Working backwards ✎ Practice
  129. Marbles — a magic trick doubles the jar Standard · Working backwards
  130. Marbles — equal after a transfer Standard · Constant total ✎ Practice
  131. Market stall baskets — small and large, loaves of bread Standard · Suppose and swap
  132. Mrs Lim's stamps — 50-cent and 80-cent Standard · Suppose and swap
  133. Mrs Lim's withdrawal — half to her son Standard · Working backwards
  134. Mrs Tan and her son — money made equal Standard · Constant total
  135. multiply a decimal Standard · Decimals and percentages
  136. multiply a decimal Standard · Decimals and percentages
  137. multiply by a multiple of a power of ten Standard · Large numbers and operation order
  138. multiply by a multiple of a power of ten Standard · Large numbers and operation order
  139. multiply up to three digits by one digit Standard · Large numbers and operation order
  140. multiply up to three digits by one digit Standard · Large numbers and operation order
  141. multiply within 40 Standard · Units and parts
  142. multiply within 40 Standard · Units and parts
  143. multiply within 40 Standard · Units and parts
  144. multiply within 40 Standard · Units and parts
  145. Noodle stalls — Uma's bowls Standard · Units and parts ✎ Practice
  146. operation precedence Standard · Large numbers and operation order
  147. operation precedence Standard · Large numbers and operation order
  148. order numbers Standard · Units and parts
  149. order numbers Standard · Units and parts
  150. PSLE 2023 — Teams 72 girls 60 boys Standard · Factors and multiples ✎ Practice
  151. PSLE 2023 — Three paint tins Standard · Units and parts
  152. read a large numeral Standard · Large numbers and operation order
  153. read a large numeral Standard · Large numbers and operation order
  154. read a numeral Standard · Large numbers and operation order
  155. read a numeral Standard · Large numbers and operation order
  156. read a numeral Standard · Large numbers and operation order
  157. read a numeral Standard · Large numbers and operation order
  158. read a numeral Standard · Large numbers and operation order
  159. read a numeral Standard · Large numbers and operation order
  160. read a numeral Standard · Units and parts
  161. read a numeral Standard · Units and parts
  162. read decimal money notation Standard · Decimals and percentages
  163. read decimal money notation Standard · Decimals and percentages
  164. recall a multiplication fact Standard · Large numbers and operation order
  165. recall a multiplication fact Standard · Large numbers and operation order
  166. represent a decimal Standard · Decimals and percentages
  167. represent a decimal Standard · Decimals and percentages
  168. represent a five-digit number Standard · Large numbers and operation order
  169. represent a five-digit number Standard · Large numbers and operation order
  170. represent a four-digit number Standard · Large numbers and operation order
  171. represent a four-digit number Standard · Large numbers and operation order
  172. represent a number Standard · Units and parts
  173. represent a number Standard · Units and parts
  174. represent a three-digit number Standard · Large numbers and operation order
  175. represent a three-digit number Standard · Large numbers and operation order
  176. Ribbon length Standard · Number × value ✎ Practice
  177. round a calculated decimal Standard · Decimals and percentages
  178. round a calculated decimal Standard · Decimals and percentages
  179. round a decimal to 1 decimal place Standard · Decimals and percentages
  180. round a decimal to 1 decimal place Standard · Decimals and percentages
  181. round a decimal to 2 decimal places Standard · Decimals and percentages
  182. round a decimal to 2 decimal places Standard · Decimals and percentages
  183. round a decimal to nearest whole number Standard · Decimals and percentages
  184. round a decimal to nearest whole number Standard · Decimals and percentages
  185. round to the nearest hundred Standard · Large numbers and operation order
  186. round to the nearest hundred Standard · Large numbers and operation order
  187. round to the nearest ten Standard · Large numbers and operation order
  188. round to the nearest ten Standard · Large numbers and operation order
  189. round to the nearest thousand Standard · Large numbers and operation order
  190. round to the nearest thousand Standard · Large numbers and operation order
  191. Shelf brackets — a carpenter buys webbing tape Standard · Number × value
  192. Spiders and beetles — 138 legs Standard · Suppose and swap
  193. Sticker book — trading and a bonus pack Standard · Working backwards
  194. Sticker collection — four friends Standard · Units and parts
  195. Stickers — Aiden's packet Standard · Working backwards
  196. Stickers — Mei and Priya end up equal Standard · Constant total
  197. subtract decimals Standard · Decimals and percentages
  198. subtract decimals Standard · Decimals and percentages
  199. subtract in columns Standard · Units and parts
  200. subtract in columns Standard · Units and parts
  201. subtract money amounts Standard · Decimals and percentages
  202. subtract money amounts Standard · Decimals and percentages
  203. subtract three-digit numbers Standard · Large numbers and operation order
  204. subtract three-digit numbers Standard · Large numbers and operation order
  205. subtract with a four-digit algorithm Standard · Large numbers and operation order
  206. subtract with a four-digit algorithm Standard · Large numbers and operation order
  207. subtract within 100 Standard · Units and parts
  208. subtract within 100 Standard · Units and parts
  209. Sweets for twelve students — how many boys Standard · Suppose and swap ✎ Practice
  210. test a one-digit factor Standard · Large numbers and operation order
  211. test a one-digit factor Standard · Large numbers and operation order
  212. Three consecutive even numbers — summing to 162 Standard · Units and parts
  213. Trading cards — Ravi gives Zack 90 Standard · Constant total
  214. understand addition Standard · Units and parts
  215. understand addition Standard · Units and parts
  216. understand division Standard · Units and parts
  217. understand division Standard · Units and parts
  218. understand division Standard · Units and parts
  219. understand division Standard · Units and parts
  220. understand equal-group multiplication Standard · Units and parts
  221. understand equal-group multiplication Standard · Units and parts
  222. understand subtraction Standard · Units and parts
  223. understand subtraction Standard · Units and parts
  224. use ordinal words and symbols Standard · Units and parts
  225. use ordinal words and symbols Standard · Units and parts
  226. whole-number division Standard · Large numbers and operation order
  227. whole-number division Standard · Large numbers and operation order
  228. whole-number multiplication Standard · Large numbers and operation order
  229. whole-number multiplication Standard · Large numbers and operation order
  230. whole-number multiplication Standard · Large numbers and operation order
  231. whole-number multiplication Standard · Large numbers and operation order
  232. write a large numeral Standard · Large numbers and operation order
  233. write a large numeral Standard · Large numbers and operation order
  234. write a numeral Standard · Large numbers and operation order
  235. write a numeral Standard · Large numbers and operation order
  236. write a numeral Standard · Large numbers and operation order
  237. write a numeral Standard · Large numbers and operation order
  238. write a numeral Standard · Large numbers and operation order
  239. write a numeral Standard · Large numbers and operation order
  240. write a numeral Standard · Units and parts
  241. write a numeral Standard · Units and parts
  242. Baskets of fruit — adult and baby monkeys Challenging · Suppose and swap
  243. Bowls of soup — teachers and students Challenging · Suppose and swap
  244. Chairs — rearranged into rows of 7 Challenging · Gap and difference ✎ Practice
  245. Coins — Helen and Ivan Challenging · Repeated identity ✎ Practice
  246. Flower pots rearranged in rows — the nursery Challenging · Gap and difference
  247. Fried noodles — 80 people sharing 85 plates Challenging · Suppose and swap ✎ Practice
  248. Gap & Difference Challenging · Gap and difference
  249. Library shelves — more books, fewer per shelf Challenging · Gap and difference
  250. Pencils — boxes of 6 leave some over, boxes of 8 fall short Challenging · Gap and difference ✎ Practice
  251. Priya and Wei Jie's beads — glass and plastic Challenging · Repeated identity
  252. PSLE 2025 — Sam and ava Challenging · Factors and multiples
  253. Shuttle bus — tourists on and off at two stops Challenging · Working backwards
  254. Stamp collectors — Nadia and Farid Challenging · Repeated identity
  255. Storybooks packed into boxes of 5 and 7 Challenging · Gap and difference
  256. Two bakers — cream buns and red bean buns Challenging · Repeated identity
  257. Water bottles on a hike — adults and children Challenging · Suppose and swap
  258. Wei Yang's money box — 20c and 50c coins Challenging · Suppose and swap
  259. Corn, sardine and tuna Very challenging · An average is a total

Fractions 91

  1. 1/2 L shared among 4 bottles Standard · Dividing fractions
  2. 1/5 L shared among 3 bottles Standard · Dividing fractions
  3. 12 L measured in 1/2 L cups Standard · Dividing fractions
  4. 2 L measured in 1/5 L cups Standard · Dividing fractions
  5. A dress and a handbag — Mei's savings Standard · Branching
  6. add fractions Standard · P5 fraction foundations
  7. add fractions Standard · P5 fraction foundations
  8. add like fractions Standard · Units and parts
  9. add like fractions Standard · Units and parts
  10. Add mixed numbers — 1 3/4 and 2 2/4 Standard · P5 fraction foundations
  11. Add mixed numbers — 2 1/3 and 1 2/3 Standard · P5 fraction foundations
  12. add related fractions Standard · P5 fraction foundations
  13. add related fractions Standard · P5 fraction foundations
  14. Ahmad's savings — books, then a game Standard · Branching ✎ Practice
  15. Ali's stickers — shared with Ben and Carol Standard · Branching ✎ Practice
  16. Ayesha's book — pages left over the weekend Standard · Units and parts
  17. compare like fractions Standard · Units and parts
  18. compare like fractions Standard · Units and parts
  19. compare unit fractions Standard · Units and parts
  20. compare unit fractions Standard · Units and parts
  21. compare unlike fractions Standard · P5 fraction foundations
  22. compare unlike fractions Standard · P5 fraction foundations
  23. convert an improper fraction Standard · P5 fraction foundations
  24. convert an improper fraction Standard · P5 fraction foundations
  25. Division as a fraction — 11 ÷ 4 Standard · P5 fraction foundations
  26. Division as a fraction — 7 ÷ 4 Standard · P5 fraction foundations
  27. find a missing denominator Standard · P5 fraction foundations
  28. find a missing denominator Standard · P5 fraction foundations
  29. find a missing numerator Standard · P5 fraction foundations
  30. find a missing numerator Standard · P5 fraction foundations
  31. Flour — Mrs Tan's cake and cookies Standard · Branching ✎ Practice
  32. Flour stock — cakes first, then bread Standard · Units and parts
  33. Fraction to decimal — 3/4 Standard · P5 fraction foundations
  34. Fraction to decimal — 7/8 Standard · P5 fraction foundations
  35. Fractions Branching Standard · Branching ✎ Practice
  36. Improper fraction × whole number Standard · P5 fraction foundations
  37. Improper fraction × whole number Standard · P5 fraction foundations
  38. interpret an improper fraction Standard · P5 fraction foundations
  39. interpret an improper fraction Standard · P5 fraction foundations
  40. Jane's book — two fifths spent Standard · Units and parts ✎ Practice
  41. Marbles — red and blue boxes, matching fractions Standard · The equal concept
  42. Marcus's savings — the new game Standard · Units and parts
  43. Mixed number × whole number Standard · P5 fraction foundations
  44. Mixed number × whole number Standard · P5 fraction foundations
  45. Mr Lim’s salary — amount saved Standard · Branching
  46. Mr Ong's pay — rent then groceries Standard · Branching
  47. Mrs Tan's $72 — groceries then a gift Standard · Branching
  48. Paint — the walls and the door Standard · Branching
  49. Priya's renovation budget — paint then tiles Standard · Units and parts
  50. Proper fraction × improper fraction Standard · P5 fraction foundations
  51. Proper fraction × improper fraction Standard · P5 fraction foundations
  52. read and represent a fraction Standard · Units and parts
  53. read and represent a fraction Standard · Units and parts
  54. recognise a fraction of a whole Standard · Units and parts
  55. recognise a fraction of a whole Standard · Units and parts
  56. recognise equivalent fractions Standard · P5 fraction foundations
  57. recognise equivalent fractions Standard · P5 fraction foundations
  58. reduce a fraction to simplest form Standard · P5 fraction foundations
  59. reduce a fraction to simplest form Standard · P5 fraction foundations
  60. Ribbon — wrapping a gift Standard · Units and parts
  61. Rope — fencing area A and area B Standard · Branching
  62. Stickers — Priya gives some away, 36 left Standard · Branching
  63. subtract fractions Standard · P5 fraction foundations
  64. subtract fractions Standard · P5 fraction foundations
  65. subtract like fractions Standard · Units and parts
  66. subtract like fractions Standard · Units and parts
  67. Subtract mixed numbers Standard · P5 fraction foundations
  68. Subtract mixed numbers Standard · P5 fraction foundations
  69. subtract related fractions Standard · P5 fraction foundations
  70. subtract related fractions Standard · P5 fraction foundations
  71. Two improper fractions Standard · P5 fraction foundations
  72. Two improper fractions Standard · P5 fraction foundations
  73. Water tank — from three-quarters full to half Standard · Units and parts
  74. 370 visitors — who bought a raffle ticket Challenging · The equal concept
  75. 810 workers — who finished on time Challenging · The equal concept
  76. 836 students — who takes the bus Challenging · The equal concept ✎ Practice
  77. A bakery bakes two kinds of loaves for its morning batch. Challenging · Units and parts
  78. John's money — T-shirt, shoes, and $120 from his parents Challenging · Branching ✎ Practice
  79. Piggy bank — a video game, headphones, and an uncle's gift Challenging · Branching
  80. Priya's money — supplies, a tote, and her aunt's gift Challenging · Branching
  81. PSLE 2024 — Devi eric haziq Challenging · Units and parts
  82. PSLE 2025 — Three rows of seats Challenging · Repeated identity
  83. Savings — a novel, a backpack, and grandmother's gift Challenging · Branching
  84. Training workshop — men and women who didn't attend Challenging · The equal concept
  85. Two groups on a learning journey — the girls Challenging · Units and parts ✎ Practice
  86. Brown and white eggs — a farmer sells some of each Very challenging · Branching
  87. Cookies — Mrs Hoon's chocolate and almond batch Very challenging · Branching ✎ Practice
  88. Mr Koh's stickers — animal and cartoon Very challenging · Branching
  89. Muffins — blueberry and raisin Very challenging · Branching
  90. Overlapping shapes — find A : B : C Very challenging · Repeated identity ✎ Practice
  91. Three flowerbeds — the overlaps Very challenging · Repeated identity

Ratio 56

  1. Alice, Bob and Carol — sharing money in ratio Standard · Units and parts ✎ Practice
  2. Ben, Mei, and Farid share a cash prize in the ratio 3 : 5 : 8. Standard · Units and parts
  3. Buns and muffins — 3 : 5 worth $55 Standard · Number × value
  4. Chickens and ducks — 3 : 2 worth $180 Standard · Number × value
  5. Find a rate Standard · Rate as an amount per unit
  6. Find a rate Standard · Rate as an amount per unit
  7. Find an amount from a rate Standard · Rate as an amount per unit
  8. Find an amount from a rate Standard · Rate as an amount per unit
  9. Find units from an amount and rate Standard · Rate as an amount per unit
  10. Find units from an amount and rate Standard · Rate as an amount per unit
  11. Liam and Noah's cards — 7 : 5 becomes 5 : 7 Standard · Constant total
  12. Nadia and Priya's beads — what Nadia gave Standard · Constant total
  13. Pencils and erasers — 5 : 3 worth $27.50 Standard · Number × value
  14. Raj, Wei Ling, and Siti packed oranges in the ratio 4 : 6 : 11. Standard · Units and parts
  15. Rate — 45 pages per minute Standard · Rate as an amount per unit
  16. Rate — 75 pages per minute Standard · Rate as an amount per unit
  17. Red and blue beads — 18 and 24 Standard · Forming and simplifying ratios
  18. Red and blue beads — 24 and 32 Standard · Forming and simplifying ratios
  19. Ribbon — cut into three in the ratio 2 : 3 : 5 Standard · Units and parts
  20. Sara and Tom's savings — what Sara gave Standard · Constant total
  21. Simplify the ratio 18 : 24 Standard · Forming and simplifying ratios
  22. Simplify the ratio 24 : 32 Standard · Forming and simplifying ratios
  23. Stickers — Mei gives some to Jun Standard · Constant total ✎ Practice
  24. Three ropes — 3 : 4 : 9 Standard · Units and parts
  25. Vending machine — chips and cookies Standard · Number × value ✎ Practice
  26. Wei and his father — a changing age ratio Standard · Constant difference
  27. Ali and Ben's savings — the ratio shifts Challenging · Constant part ✎ Practice
  28. Ali and Billy — 2 : 1 becomes 4 : 1 Challenging · Everything changed ✎ Practice
  29. Amusement park Challenging · Units and parts ✎ Practice
  30. Apples and pears — red and green Challenging · Units and parts
  31. Chess club — boys join, girls leave Challenging · Everything changed
  32. Chickens and ducks — some ducks sold at market Challenging · Constant part
  33. Chocolates — all three end equal Challenging · Constant total ✎ Practice
  34. Container P and Container Q held marbles in the ratio 9 : 7. Challenging · Constant total
  35. Cookies — Box A and Box B swap Challenging · Constant total ✎ Practice
  36. Emma and Lily's savings — 2 : 1 becomes 4 : 1 Challenging · Everything changed ✎ Practice
  37. Ken and Mei's piggy banks held money in the ratio 3 : 1. Challenging · Constant total
  38. Marbles — Marcus and Ben's game Challenging · Everything changed
  39. Marbles — Priya and Zara swap shares Challenging · Constant total
  40. Marbles — Ravi, Suresh and Tara end up equal Challenging · Constant total
  41. Maya and Liam had stickers in the ratio 7 : 5. Challenging · Constant total
  42. Mrs Tan and Mrs Lee's stamps — 2 : 1 to 4 : 1 Challenging · Everything changed
  43. Muffins — the apple ones stay put Challenging · Constant part ✎ Practice
  44. Pebbles — Ali and Ben end up equal Challenging · Constant total ✎ Practice
  45. Pens and pencils — after some pens are sold Challenging · Constant part
  46. PSLE 2025 — Ginger and onions Challenging · The equal concept
  47. Ravi and Suresh's marbles — 2 : 1 to 4 : 1 Challenging · Everything changed
  48. Stickers — Mei and Sam's changing ratio Challenging · Constant part
  49. Tank X and Tank Y held water in the ratio 7 : 9. Challenging · Constant part
  50. The ratio of Aisha's savings to Mei's savings was 3:1. Challenging · Everything changed
  51. The ratio of Ravi's marbles to Tom's marbles was 5 : 8. Challenging · Constant part
  52. Toy cars and robots — after some robots are sold Challenging · Constant part
  53. Trading cards — Farah and Wei Ling Challenging · Constant total
  54. Aisha bought some hair clips and gave half of them to Priya. Very challenging · Repeated identity
  55. Cookies and jellybeans — Mei and Wei trade Very challenging · Repeated identity
  56. Jim and Ken — sweets and chocolates Very challenging · Repeated identity ✎ Practice

Percentage 42

  1. A bicycle's price — the percentage increase Standard · Units and parts
  2. A sunflower — the percentage increase Standard · Units and parts
  3. An antique vase — the cost price Standard · Working backwards
  4. backpack — percentage decrease Standard · Percentage change
  5. Bicycle shop — sold at a profit Standard · Working backwards
  6. decimal divide Standard · Decimals and percentages
  7. decimal divide Standard · Decimals and percentages
  8. decimal multiply Standard · Decimals and percentages
  9. decimal multiply Standard · Decimals and percentages
  10. discount Standard · Decimals and percentages
  11. discount Standard · Decimals and percentages
  12. Farmland — coconut, rice and fallow land Standard · Units and parts
  13. gst Standard · Decimals and percentages
  14. gst Standard · Decimals and percentages
  15. interest Standard · Decimals and percentages
  16. interest Standard · Decimals and percentages
  17. interpret percent Standard · Decimals and percentages
  18. interpret percent Standard · Decimals and percentages
  19. jacket — percentage decrease Standard · Percentage change
  20. Jacket — sold at a profit Standard · Working backwards ✎ Practice
  21. John's salary — rent, food and savings Standard · Units and parts ✎ Practice
  22. km to m Standard · Decimals and percentages
  23. km to m Standard · Decimals and percentages
  24. Laptop price — the percentage increase Standard · Units and parts ✎ Practice
  25. Library books — fiction, non-fiction and reference Standard · Units and parts
  26. litre to ml Standard · Decimals and percentages
  27. litre to ml Standard · Decimals and percentages
  28. m to cm Standard · Decimals and percentages
  29. m to cm Standard · Decimals and percentages
  30. Mrs Kumar's bonus — shopping, charity, savings Standard · Units and parts
  31. part as percent Standard · Decimals and percentages
  32. part as percent Standard · Decimals and percentages
  33. Pie chart — 25% chose Science Standard · Units and parts ✎ Practice
  34. School enrolment — the percentage increase Standard · Units and parts
  35. Shirt — $85 after a 15% discount Standard · Working backwards
  36. Wedding cake — sold at a profit Standard · Working backwards
  37. Game cards — a fifth changes hands Challenging · Constant total ✎ Practice
  38. Mr. Challenging · Constant total
  39. PSLE 2024 — Jamie oliver egg tarts Challenging · Number × value
  40. PSLE 2025 — Zach jacket Challenging · Working backwards
  41. At the concert — how many girls Very challenging · The equal concept ✎ Practice
  42. PSLE 2024 — Jamie oliver egg tarts Very challenging · Number × value

Area, Perimeter & Volume 100

  1. A square with area 100 cm² Standard · Work backwards from volume or area
  2. A square with area 64 cm² Standard · Work backwards from volume or area
  3. area of a triangle Standard · Area and volume foundations
  4. area of a triangle Standard · Area and volume foundations
  5. Area of triangle Standard · Overlap and cancel
  6. build a solid from unit cubes Standard · Area and volume foundations
  7. build a solid from unit cubes Standard · Area and volume foundations
  8. circle area — radius 14 cm Standard · Circles and curved boundaries
  9. circle area — radius 21 cm Standard · Circles and curved boundaries
  10. circumference — radius 14 cm Standard · Circles and curved boundaries
  11. circumference — radius 21 cm Standard · Circles and curved boundaries
  12. composite perimeter — radius 14 cm Standard · Circles and curved boundaries
  13. composite perimeter — radius 14 cm Standard · Circles and curved boundaries
  14. Cuboid face area — volume 384 cm³ Standard · Work backwards from volume or area
  15. Cuboid face area — volume 480 cm³ Standard · Work backwards from volume or area
  16. Cuboid height — volume 240 cm³ Standard · Work backwards from volume or area
  17. Cuboid height — volume 480 cm³ Standard · Work backwards from volume or area
  18. distinguish area from perimeter Standard · Rectangle and square measurement
  19. distinguish area from perimeter Standard · Rectangle and square measurement
  20. draw a cuboid on an isometric grid Standard · Area and volume foundations
  21. draw a cuboid on an isometric grid Standard · Area and volume foundations
  22. find a rectangle side from area Standard · Rectangle and square measurement
  23. find a rectangle side from area Standard · Rectangle and square measurement
  24. find a rectangle side from perimeter Standard · Rectangle and square measurement
  25. find a rectangle side from perimeter Standard · Rectangle and square measurement
  26. find a rectangle side from perimeter Standard · Rectangle and square measurement
  27. find a square side from area Standard · Rectangle and square measurement
  28. find a square side from area Standard · Rectangle and square measurement
  29. find a square side from perimeter Standard · Rectangle and square measurement
  30. find a square side from perimeter Standard · Rectangle and square measurement
  31. find rectangle area Standard · Rectangle and square measurement
  32. find rectangle area Standard · Rectangle and square measurement
  33. find rectangle perimeter Standard · Rectangle and square measurement
  34. find rectangle perimeter Standard · Rectangle and square measurement
  35. find rectilinear perimeter Standard · Rectangle and square measurement
  36. find rectilinear perimeter Standard · Rectangle and square measurement
  37. find square area Standard · Rectangle and square measurement
  38. find square area Standard · Rectangle and square measurement
  39. find square perimeter Standard · Rectangle and square measurement
  40. find square perimeter Standard · Rectangle and square measurement
  41. Grid drawing: equal-area triangle without overlap Standard · Area and volume foundations
  42. liquid volume in a tank Standard · Area and volume foundations
  43. liquid volume in a tank Standard · Area and volume foundations
  44. litres and cubic centimetres Standard · Area and volume foundations
  45. litres and cubic centimetres Standard · Area and volume foundations
  46. matching base and height Standard · Area and volume foundations
  47. matching base and height Standard · Area and volume foundations
  48. measure area with square units Standard · Rectangle and square measurement
  49. measure area with square units Standard · Rectangle and square measurement
  50. perimeter of a composite rectilinear figure Standard · Rectangle and square measurement
  51. perimeter of a composite rectilinear figure Standard · Rectangle and square measurement
  52. quarter area — radius 14 cm Standard · Circles and curved boundaries
  53. quarter area — radius 21 cm Standard · Circles and curved boundaries
  54. quarter perimeter — radius 14 cm Standard · Circles and curved boundaries
  55. quarter perimeter — radius 21 cm Standard · Circles and curved boundaries
  56. Rectangle — length to width ratio 5 : 2 Standard · Units and parts
  57. semicircle area — radius 14 cm Standard · Circles and curved boundaries
  58. semicircle area — radius 21 cm Standard · Circles and curved boundaries
  59. semicircle perimeter — radius 14 cm Standard · Circles and curved boundaries
  60. semicircle perimeter — radius 21 cm Standard · Circles and curved boundaries
  61. volume in cubic units Standard · Area and volume foundations
  62. volume in cubic units Standard · Area and volume foundations
  63. volume of a cube Standard · Area and volume foundations
  64. volume of a cube Standard · Area and volume foundations
  65. volume of a cuboid Standard · Area and volume foundations
  66. volume of a cuboid Standard · Area and volume foundations
  67. Water — poured into a second container Standard · Repeated identity
  68. Bakery countertop — coasters around the display case Challenging · Number × value
  69. Canvas — cut into a square and eight triangles Challenging · Seeing it move
  70. Devi's square — eight triangles Challenging · Seeing it move ✎ Practice
  71. Eleven planks — the area of PQRS Challenging · Repeated identity
  72. Five semicircles on a line — the diameter Challenging · Overlap and cancel ✎ Practice
  73. Footpath — circular tiles Challenging · Number × value ✎ Practice
  74. Garden PQRS — the path and the shaded triangles Challenging · Overlap and cancel
  75. Kite paper — triangle LMN Challenging · Seeing it move
  76. Library hall — the partition and the shaded triangles Challenging · Overlap and cancel
  77. Mrs Lim's scarf — cut into eight triangles Challenging · Seeing it move
  78. Nine rectangles — the area of ABCD Challenging · Repeated identity ✎ Practice
  79. Nine tiles — the area of WXYZ Challenging · Repeated identity
  80. Overlapping squares Challenging · Overlap and cancel
  81. Painted block — Ravi cuts it into cubes Challenging · Seeing it move
  82. Paper flags — two strings, one courtyard Challenging · Overlap and cancel
  83. PSLE 2023 — Rods and straws grid Challenging · Growing patterns and tables
  84. PSLE 2023 — Three trapeziums perimeter Challenging · Overlap and cancel
  85. PSLE overlapping shapes Challenging · Overlap and cancel ✎ Practice
  86. Rectangle — a square bitten out of one corner Challenging · Seeing it move
  87. Rectangle ACEG — the shaded triangles Challenging · Overlap and cancel ✎ Practice
  88. Seven photo frames — the area of EFGH Challenging · Repeated identity
  89. Toy train tracks — matching carriages to a connector Challenging · Overlap and cancel
  90. Two tanks — same flow rate, equal height Challenging · Same time, same distance
  91. A box of cube candles — large and small Very challenging · Repeated identity
  92. A crate of chocolate cubes — large and small Very challenging · Repeated identity
  93. A tray of ice blocks — large and small Very challenging · Repeated identity
  94. Bunting flags — three overlapping triangles on a string Very challenging · Overlap and cancel
  95. Jack's cubes — large and small in a box Very challenging · Repeated identity ✎ Practice
  96. Rectangles ABDF and BCEF — length of BC Very challenging · Repeated identity ✎ Practice
  97. Tarpaulins — P, Q and R overlap on the floor Very challenging · Overlap and cancel
  98. Two fabric patches — the length of BC Very challenging · Repeated identity
  99. Two flower beds — the length of BC Very challenging · Repeated identity
  100. Two kite panels — the length of BC Very challenging · Repeated identity

Speed, Distance & Time 85

  1. Aladdin and Jasmine — the magic carpet race Standard · Same time, same distance ✎ Practice
  2. Bus and car — the catch-up Standard · Same time, same distance ✎ Practice
  3. choose a measurement unit Standard · Decimals and percentages
  4. choose a measurement unit Standard · Decimals and percentages
  5. choose kilometres for distance Standard · Decimals and percentages
  6. choose kilometres for distance Standard · Decimals and percentages
  7. choose millilitres for liquid volume Standard · Decimals and percentages
  8. choose millilitres for liquid volume Standard · Decimals and percentages
  9. compare centimetre lengths Standard · Units and parts
  10. compare centimetre lengths Standard · Units and parts
  11. compare lengths Standard · Decimals and percentages
  12. compare lengths Standard · Decimals and percentages
  13. compare masss Standard · Decimals and percentages
  14. compare masss Standard · Decimals and percentages
  15. compare volumes Standard · Decimals and percentages
  16. compare volumes Standard · Decimals and percentages
  17. convert hours and minutes to minutes Standard · Decimals and percentages
  18. convert hours and minutes to minutes Standard · Decimals and percentages
  19. convert kg and g Standard · Decimals and percentages
  20. convert kg and g Standard · Decimals and percentages
  21. convert km and m Standard · Decimals and percentages
  22. convert km and m Standard · Decimals and percentages
  23. convert L and mL Standard · Decimals and percentages
  24. convert L and mL Standard · Decimals and percentages
  25. convert m and cm Standard · Decimals and percentages
  26. convert m and cm Standard · Decimals and percentages
  27. distinguish a.m. and p.m. Standard · Units and parts
  28. distinguish a.m. and p.m. Standard · Units and parts
  29. draw a segment Standard · Units and parts
  30. draw a segment Standard · Units and parts
  31. Drone race — X and Y to the rooftop Standard · Same time, same distance
  32. express a measurement in compound units Standard · Decimals and percentages
  33. express a measurement in compound units Standard · Decimals and percentages
  34. find a finishing time Standard · Decimals and percentages
  35. find a finishing time Standard · Decimals and percentages
  36. find a starting time Standard · Working backwards
  37. find a starting time Standard · Working backwards
  38. find elapsed duration Standard · Decimals and percentages
  39. find elapsed duration Standard · Decimals and percentages
  40. interpret cm Standard · Units and parts
  41. interpret cm Standard · Units and parts
  42. interpret h and min Standard · Units and parts
  43. interpret h and min Standard · Units and parts
  44. Kayaking race — Ben and Farah Standard · Units and parts
  45. measure a segment Standard · Units and parts
  46. measure a segment Standard · Units and parts
  47. measure hours and minutes Standard · Decimals and percentages
  48. measure hours and minutes Standard · Decimals and percentages
  49. measure length in centimetres Standard · Units and parts
  50. measure length in centimetres Standard · Units and parts
  51. measure length in metres Standard · Decimals and percentages
  52. measure length in metres Standard · Decimals and percentages
  53. measure liquid volume in litres Standard · Decimals and percentages
  54. measure liquid volume in litres Standard · Decimals and percentages
  55. measure mass in kilograms or grams Standard · Decimals and percentages
  56. measure mass in kilograms or grams Standard · Decimals and percentages
  57. measure time in seconds Standard · Decimals and percentages
  58. measure time in seconds Standard · Decimals and percentages
  59. Mr Lee's drive — Town A to Town B Standard · Number × value ✎ Practice
  60. Race cars — Car A and Car B Standard · Same time, same distance
  61. read a clock in five-minute intervals Standard · Units and parts
  62. read a clock in five-minute intervals Standard · Units and parts
  63. read an analogue clock to the minute Standard · Decimals and percentages
  64. read an analogue clock to the minute Standard · Decimals and percentages
  65. read the 24-hour clock Standard · Decimals and percentages
  66. read the 24-hour clock Standard · Decimals and percentages
  67. recognise one-hour and half-hour durations Standard · Units and parts
  68. recognise one-hour and half-hour durations Standard · Units and parts
  69. Roller-skating race — Kai and Mia Standard · Units and parts
  70. Siti cycles to the beach — arrival time Standard · Number × value
  71. Speedboats — the Dolphin and the Marlin race to an island Standard · Same time, same distance
  72. The express train — arrival time Standard · Number × value
  73. The ferry to Coral Island — arrival time Standard · Number × value
  74. Two pipes — filling a tank together Standard · Number × value
  75. Two trains — leaving in opposite directions Standard · Same time, same distance
  76. Two workers — finishing a job together Standard · Number × value
  77. Ahmad's walk to school and back Challenging · An average is a total ✎ Practice
  78. Cycling race — Mei and Lin Challenging · Same time, same distance ✎ Practice
  79. Ice-cream stalls — Stall A and Stall B Challenging · Same time, same distance
  80. Printing machines Challenging · Same time, same distance ✎ Practice
  81. Priya and Wei Ming wrap sweets by hand at a candy factory. Challenging · Same time, same distance
  82. Priya's ride to the library — average speed Challenging · An average is a total
  83. PSLE 2012 — Bakery and library Challenging · Same time, same distance
  84. Rowing upstream and back — average speed Challenging · An average is a total
  85. The delivery van — average speed there and back Challenging · An average is a total

Data Analysis & Averages 34

  1. A bakery's week — average daily sales Standard · An average is a total
  2. A cyclist's five checkpoints — average speed Standard · An average is a total
  3. Average height — a class of 40 pupils Standard · An average is a total ✎ Practice
  4. Books read — a bar graph of five children Standard · An average is a total ✎ Practice
  5. complete a data table Standard · Read and complete data displays
  6. complete a data table Standard · Read and complete data displays
  7. Courier parcels — the average mass Standard · An average is a total
  8. Egg trays — the average over four days Standard · An average is a total
  9. extract bar-graph data Standard · Read and complete data displays
  10. extract bar-graph data Standard · Read and complete data displays
  11. Five market stalls — the average donation Standard · An average is a total
  12. Four cousins — the mean age Standard · An average is a total
  13. Four numbers — the missing one Standard · An average is a total ✎ Practice
  14. Four parcels — the mean mass Standard · An average is a total
  15. interpret an axis scale Standard · Read and complete data displays
  16. interpret an axis scale Standard · Read and complete data displays
  17. Line graph — average of five temperature readings Standard · An average is a total ✎ Practice
  18. Parcels — total 120 kg, average 12 kg Standard · An average is a total
  19. Parcels — total 150 kg, average 15 kg Standard · An average is a total
  20. read a line graph Standard · Read and complete data displays
  21. read a line graph Standard · Read and complete data displays
  22. read a pie chart Standard · Read and complete data displays
  23. read a pie chart Standard · Read and complete data displays
  24. read a scaled picture graph Standard · Read and complete data displays
  25. read a scaled picture graph Standard · Read and complete data displays
  26. read a table Standard · Read and complete data displays
  27. read a table Standard · Read and complete data displays
  28. read an unscaled picture graph Standard · Read and complete data displays
  29. read an unscaled picture graph Standard · Read and complete data displays
  30. Savings — the mean of four pupils Standard · An average is a total
  31. Seashells — the average of five friends Standard · An average is a total
  32. Shop sales — a sixth day pulls the average down Standard · An average is a total
  33. Test scores — a sixth student joins the group Standard · An average is a total
  34. Tammy — three boxes of apples Challenging · An average is a total

Geometry & Angles 80

  1. angles around a point Standard · Angle and shape properties
  2. angles around a point Standard · Angle and shape properties
  3. Angles on a line — two equal ones and 62° Standard · Angle chasing ✎ Practice
  4. angles on a straight line Standard · Angle and shape properties
  5. angles on a straight line Standard · Angle and shape properties
  6. combine plane shapes Standard · Seeing it move
  7. combine plane shapes Standard · Seeing it move
  8. compare with a right angle Standard · Angle and shape properties
  9. compare with a right angle Standard · Angle and shape properties
  10. complete a shape pattern Standard · Seeing it move
  11. complete a shape pattern Standard · Seeing it move
  12. complete a symmetric figure Standard · Seeing it move
  13. complete a symmetric figure Standard · Seeing it move
  14. copy a figure on a grid Standard · Seeing it move
  15. copy a figure on a grid Standard · Seeing it move
  16. draw a plane representation of a solid Standard · Seeing it move
  17. draw a plane representation of a solid Standard · Seeing it move
  18. draw a rectangle Standard · Seeing it move
  19. draw a square Standard · Seeing it move
  20. draw an angle Standard · Angle and shape properties
  21. draw an angle Standard · Angle and shape properties
  22. draw parallel lines Standard · Seeing it move
  23. draw parallel lines Standard · Seeing it move
  24. draw perpendicular lines Standard · Seeing it move
  25. draw perpendicular lines Standard · Seeing it move
  26. equilateral triangle angles Standard · Angle and shape properties
  27. identify a line of symmetry Standard · Seeing it move
  28. identify a line of symmetry Standard · Seeing it move
  29. identify a plane representation of a solid Standard · Seeing it move
  30. identify a plane representation of a solid Standard · Seeing it move
  31. identify a solid from its net Standard · Seeing it move
  32. identify a solid from its net Standard · Seeing it move
  33. identify shapes inside a figure Standard · Seeing it move
  34. identify shapes inside a figure Standard · Seeing it move
  35. isosceles triangle angles Standard · Angle and shape properties
  36. isosceles triangle angles Standard · Angle and shape properties
  37. measure an angle Standard · Angle and shape properties
  38. measure an angle Standard · Angle and shape properties
  39. name an angle Standard · Angle and shape properties
  40. name an angle Standard · Angle and shape properties
  41. Net of a cube — the opposite face Standard · Seeing it move ✎ Practice
  42. parallelogram angles Standard · Angle and shape properties
  43. parallelogram angles Standard · Angle and shape properties
  44. recognise a plane shape Standard · Seeing it move
  45. recognise a plane shape Standard · Seeing it move
  46. recognise a solid shape Standard · Seeing it move
  47. recognise a solid shape Standard · Seeing it move
  48. recognise a symmetric figure Standard · Seeing it move
  49. recognise a symmetric figure Standard · Seeing it move
  50. recognise a valid net Standard · Seeing it move
  51. recognise a valid net Standard · Seeing it move
  52. recognise an angle Standard · Angle and shape properties
  53. recognise an angle Standard · Angle and shape properties
  54. recognise perpendicular and parallel lines Standard · Seeing it move
  55. recognise perpendicular and parallel lines Standard · Seeing it move
  56. rectangle properties Standard · Seeing it move
  57. rhombus angles Standard · Angle and shape properties
  58. rhombus angles Standard · Angle and shape properties
  59. right triangle angles Standard · Angle and shape properties
  60. right triangle angles Standard · Angle and shape properties
  61. square properties Standard · Seeing it move
  62. trapezium angles Standard · Angle and shape properties
  63. trapezium angles Standard · Angle and shape properties
  64. triangle angle total Standard · Angle and shape properties
  65. triangle angle total Standard · Angle and shape properties
  66. Triangle PQR — angle Q is twice angle R Standard · Angle chasing
  67. unknown angle in a quadrilateral Standard · Angle and shape properties
  68. unknown angle in a quadrilateral Standard · Angle and shape properties
  69. vertically opposite angles Standard · Angle and shape properties
  70. vertically opposite angles Standard · Angle and shape properties
  71. A display easel — angle EAB Challenging · Angle chasing
  72. A kite skeleton — angle EAB Challenging · Angle chasing
  73. A trellis and a lattice — angle EAB Challenging · Angle chasing
  74. Folded flag — the scout leader's crease angle Challenging · Seeing it move
  75. Folded kite fabric — the kite-maker's crease angle Challenging · Seeing it move
  76. Folded napkin — the angle at the crease Challenging · Seeing it move
  77. Folding angle — find x Challenging · Seeing it move ✎ Practice
  78. Parallelogram BCDE — find ∠EAB Challenging · Angle chasing ✎ Practice
  79. Three overlapping triangles — the shaded perimeter Challenging · Overlap and cancel ✎ Practice
  80. Triangular blocks — Mr Kumar's workbench Challenging · Overlap and cancel

Number Patterns 11

  1. Dot pattern — Figure 6 Standard · Growing patterns and tables ✎ Practice
  2. Farmer Aziz puts fence posts around square flower beds. Standard · Growing patterns and tables
  3. Mrs Tan is setting out chairs in rows for a wedding dinner. Standard · Growing patterns and tables
  4. Red beads — a bracelet pattern Standard · Growing patterns and tables
  5. Grey and white triangles — Figure 250 Challenging · Growing patterns and tables ✎ Practice
  6. Patchwork badges — orange and purple triangles, Figure n Challenging · Growing patterns and tables
  7. PSLE 2024 — Repeating digits 2041 Challenging · Growing patterns and tables
  8. PSLE 2024 — Two numbers six factors Challenging · Factors and multiples
  9. PSLE 2025 — Two patterns common terms Challenging · Growing patterns and tables
  10. Triangular mosaics — red and blue tiles in Figure n Challenging · Growing patterns and tables
  11. Pattern Very challenging · Growing patterns and tables

Algebra 10

  1. Algebra — interpret Standard · Algebra basics
  2. Algebra — interpret Standard · Algebra basics
  3. Algebra — represent Standard · Algebra basics
  4. Algebra — represent Standard · Algebra basics
  5. Algebra — simplify Standard · Algebra basics
  6. Algebra — simplify Standard · Algebra basics
  7. Algebra — solve Standard · Algebra basics
  8. Algebra — solve Standard · Algebra basics
  9. Algebra — substitute Standard · Algebra basics
  10. Algebra — substitute Standard · Algebra basics