Question P5–P6 Number × value
Today’s problem — free all day, every step. Every day has one.
A scout troop is preparing 320 flags for a parade. Each flag needs 45 cm of string to tie it to a pole. String is sold in reels of 10 m. How many reels must the troop buy?
Answer
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One batch repeats. Work out one batch, then multiply.
In this one. Round down when counting complete lengths from one reel, then round up when counting whole reels to buy.
Items are described as a fixed group or ratio that repeats, such as tiles following a pattern, snacks sold in a fixed mix, or a rate given per hour or per item.
Children start from the grand total instead of first working out what one batch is worth. In rate questions they also confuse a duration with a clock time.
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