Question P4–P5–P6 Units and parts
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Four classmates saved money for a class trip. Liam saved $15 less than Sara. Priya saved twice as much as Sara. Tom saved $9 less than Priya. Altogether the four classmates saved $126. How much did Tom save?
Answer
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Cut one amount into equal shares. One number tells you what a share is worth.
In this one. Complete Liam's and Tom's short bars by adding back $15 and $9; then all four amounts can be counted as six equal Sara-units.
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.
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.
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