Posted by johnnie on Saturday, February 21, 2009 at 2:18pm.
No to your first question.
-6-(-2)= -6 + 2 = __
No to your second question, also.
The common denominator to use is 14.
-5/14 + 9/7 = -5/14 + 18/14 = (18-5)/14
= 13/14
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