Posted by davis on Tuesday, September 28, 2010 at 11:03am.
It depends on how the terms are groups shown by parentheses and/or brackets. It makes things clearer, if you put spaces between the terms, as I did below.
7 - (-1)/3(2) - 9/(-3) = 7+1/6 + 3 = 10 1/6
[7-(-1)]/3(2) - 9/(-3) = 8/6 + 3 = 4 2/3
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