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21 April, 15:06

Explain how to find 40x80 using mental math

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  1. 21 April, 15:12
    0
    40

    x80

    0x0 = 0

    40 40x80=320

    x80

    4x8=32
  2. 21 April, 15:23
    0
    40x80 is not 320 heres how ...

    Since 4x8 is 32 you can add the two 0s to the back of 32 and you will get 3200. Thats rhe rule for multiplying any number that ends with zero
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