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To find 6x8 i can use the facts for 5x4 and 1x4. do you agree, if so explain

  • math -

    I don't see how
    5x4=20 and 1x4 = 4, so ...?

    When I was a kid, they "made me" learn that
    6x8 = 48 , and somehow I still know that.

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