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OpenStudy (anonymous):
7+-2=?
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jimthompson5910 (jim_thompson5910):
7 + -2 is really the same as 7 - 2
jimthompson5910 (jim_thompson5910):
when you add on a negative, you're really subtracting
OpenStudy (anonymous):
oh i see now
OpenStudy (doc.brown):
\[(+7)+(-2)\]
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