3rd grade

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what is a set of related addition and subtraction number sentences useing the same numbers

  • 3rd grade -

    2 + 5 = 7
    7 - 2 = 5

    10 + 4 = 14
    14 - 4 = 10

  • 3rd grade -

    15 - 7 = 8
    15 - 8 = 7

    8 + 7 = 15
    7 + 8 = 15

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