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OpenStudy (anonymous):
Subtract -9-(+9)
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OpenStudy (anonymous):
= -9-9 = -18
OpenStudy (anonymous):
Note that (-) x (+) = (-)
OpenStudy (anonymous):
Review your integer laws here http://www.intmath.com/numbers/1-integers.php#properties
OpenStudy (anonymous):
Thanks
OpenStudy (anonymous):
NP :)
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