Teacher2Teacher 
Q&A #6433 
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From: Lisa Phipps To: Teacher2Teacher Public Discussion Date: 2005032311:23:22 Subject: math My daughter is learning subtraction of intergers and it's been years since I've done them. When do you change the sign for the second number? and why? She has 5 + +7=. he teacher told her she needed to change it to 5  7=. Why do you change it? On the first one I would get +2 and on the second one I would get 2. Is this correct?
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