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25 June, 10:46

What two ways can you find the product of 8x997 using mental math

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  1. 25 June, 11:06
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    8=10-2 or

    997=1000-3

    so we can use distributive property

    remember, a (b+c) = ab+ac

    for the first one

    8 (997) = (10-2) (997) = 997 (10-2) = 997 (10) + 997 (-2) = 9970-1994=7976

    2nd one

    8 (997) = 8 (1000-3) = 8 (1000) + 8 (-3) = 8000-24=7976
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