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OpenStudy (anonymous):
Evaluate 7 - (-1).
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OpenStudy (anonymous):
8
TheSmartOne (thesmartone):
when you subtract a negative number, you have to add so a - (-b) = a + b So, what is 7 + 1 = ?
OpenStudy (anonymous):
because a negative + a negative = a positive
OpenStudy (anonymous):
thnx guys
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