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Adding or subtracting 10 - Adding and subtracting: Video playlist - BBC Bitesize
Adding by making 10 is also called bridging through 10.
↗ https://www.bbc.co.uk/bitesize/topics/zqrtjfr/watch/z4fq46fAdding by making 10 is also called bridging through 10.
↗ https://www.bbc.co.uk/bitesize/topics/zqrtjfr/watch/z4fq46f