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OpenStudy (anonymous):
someone help me and fast medal
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OpenStudy (anonymous):
wot@
OpenStudy (anonymous):
1. (34 + 11) + 9 = (11 + 34) + 9 2. 25 + (–15 + 4) = (25 + (–15)) + 4 3. –(–21 + 8) = 21 + (–8) 4. –30 + (–16) = –16 + (–30)
OpenStudy (anonymous):
A. commutative property B. associative property C. opposite of a sum property
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