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posted by Candice Monday, April 1, 2013 at 11:58am.
Which property would allow you to use mental computation to simplify the problem 27 + 15 + 3 + 5?
commutative and associative 27 + 15 + 3 + 5 = 27 + 3 + 15 + 5 = 30 + 20 = 50
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