Question P5–P6 Units and parts
Today’s problem — free all day, every step. Every day has one.
Mei used of a ribbon to wrap a gift. She had 45 cm of ribbon left. What was the length of the ribbon 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. Match the given 45 cm to the 5 equal units that were left, not to the whole 7 units or the 2 used 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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