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Mathematics, 15.07.2019 13:00 angelaOR

Here's a subtraction problem that has been solved incorrectly. 2 1 - 9 1 1 choose the addition sentence that checks this subtraction problem. a)21 + 9 30 b)1 1 + 9 2 0 c)1 1 + 2 1 3 2

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Here's a subtraction problem that has been solved incorrectly. 2 1 - 9 1 1 choose the addition sente...
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