Addition using bar models (1)

Bar models can be a great help when adding mentally. Children may also want to make jottings when doing these.

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Work carefully, using patterns such as pairs of numbers that make 10, to help answer these.

Working carefully, looking for patterns to help, remembering that addition can be done in any order.

Mental addition questions which get quite tricky.

Add two 4-digit multiples of 100 whith exchange.

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