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math elementary

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add. write the doubles fact used to solve each one.

6+7 =13
please explain how to use doubles plus 1 and doubles minus 1

  • math elementary -

    how much did maria bean plant grow between day 2 and day 3

  • math elementary -

    double the biggest number then take away one eg 4+4=8-1=7 that is the example of 4+3=7

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