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Priya's renovation budget — paint then tiles
Priya spent $24 on paint for her renovation budget. This was of her total budget. After buying the paint, she spent of the remaining budget on tiles. How much did she spend on tiles?
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The pattern behind it: Units and parts
Cut one amount into equal shares. One number tells you what a share is worth.
In this one. Because the known $24 covers exactly 3 of the 10 equal budget units, dividing by 3 fixes each unit at $8 and turns the rest of the model into dollar amounts.
How to spot it
A single amount is split by a ratio, a fraction or a percentage. One extra number gives you the leftover, the difference, or the value of one share.
Common mistake
Children match the given number to the wrong number of shares, using the whole bar when the number covers only the leftover or the difference between two people's shares.
Try one like it
Standard Ayesha's book — pages left over the weekend Ayesha read 5/8 of a book over the weekend. She had 51 pages left to read. How many pages does the book have in total?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.
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