Question P4–P5–P6 Units and parts
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Gopal had 3 identical tins of paint that were filled to the brim. He poured 760 ml out of each tin. The total amount of paint left in the 3 tins was equal to the amount of paint in 1 full tin at first. How much paint was in each tin at first?
Answer
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Cut one amount into equal shares. One number tells you what a share is worth.
In this one. If 3 tins minus the pourings leaves 1 tin, then what was poured out is exactly the other 2 tins — so 3 × 760 = 2280 ml is 2 whole tins, not a fraction of one.
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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