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OpenStudy (anonymous):
Will Give Medal! Which equation demonstrates the opposite of a sum property? A. (13 + 7) + 3 = (7 + 13) + 3 B. -9 + 14 = 14 + (-9) C. (7 + (-2)) + 12 = 7 + ((-2) + 12) D. -(-3 + 11) = 3 + (-11)
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OpenStudy (anonymous):
c
OpenStudy (anonymous):
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