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16-09-2014
Mathematics

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write two addition sentences where the sum is positive. in each sentence, one addend should be positive and the other negative

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16-09-2014

10 + (-5) = 10 - 5 = 5

-11 + 20 = 20 + (-11) = 20 - 11 = 9

102 + (-1) = 102 - 1 = 101

-20 + 60 = 60 + (-20) = 60 - 20 = 40

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