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Answered 2009-12-28 20:10:56

multiplying and dividing- positive * positive= positive

positive * negative=negative

negative *negative=positive

subtracting- -3-6=?

1. freeze first number- -3

2.reverse the sign to a addition- -3+

3.Reverse the sign of the number- -3+-6= -9

adding- keep the sign of the larger number, then add/subtract

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