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Question P5–P6 Number × value

Ribbon length

Jess needs 200 ribbons, each 110 cm long. Ribbon is sold in tapes of 25 m (2500 cm). How many tapes does she need?

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About this method

Number × value

One batch repeats. Work out one batch, then multiply.

In this one. Rounding has a direction, and the physical object decides it: inside one tape you round down (there is no part-ribbon), across tapes you round up (there is no part-tape).

4 batches, all the sameIn allwork out this one, then ×4

How to spot it

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.

Common mistake

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.

Practise a similar question

Standard 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?
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