Question P6 Units and parts
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Ben, Mei, and Farid share a cash prize in the ratio 3 : 5 : 8. Farid's share is $60 more than Ben's share. Find the total prize money.
Answer
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Cut one amount into equal shares. One number tells you what a share is worth.
In this one. The $60 is not one person's share; it is the value of the 5-unit gap between Farid's 8 units and Ben's 3 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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