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28 June, 18:35

Fred wants to find 48+34 using compensation. He says you can take 2 from 34 and give it to 48 to make 50. What is the sum? Explain why compensation can work to find the sum.

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  1. 28 June, 21:35
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    It is easier to add 50 to a number than 48 because 50 has a zero in it which makes an addition simpler.

    48 + 34 = borrow 2 from 34 and add to 48

    = 50 + 32 50 + 32 is 82

    = 82
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