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7 January, 08:58

Explain how to estimate 368+231 two differ ways

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  1. 7 January, 11:37
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    3 + 2 = 5

    6 + 3 = 9

    8 + 1 = 9

    So the answer is 599

    Second way:

    round down the digits into hundreds, tens, and ones then get the sum of those.

    300 + 200 = 500

    60 + 30 = 90

    8 + 1 = 9

    500 + 90 + 9 is 599
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