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Question by  Mel (37)

How do you subtract negative numbers?

 
+7

Answer by  Diddum (348)

Subtracting a negative number is like adding the positive one. Example: 10 - (-2) is like 10 + 2 = 12. In general assume you have A - (-B) = X and you want to find X. You can add (-B) to both sides: A - (-B) + (-B) = X + (-B) hence A = X - B and adding B to both sides you obtain A + B = X

 
+4

Answer by  tamarawilhite (17883)

When both numbers are negative, the behavior is as if you are dealing with positive numbers. For example, -5 subtracted from -5 is -10. It is essentially adding them, then adding on the negative sign.

 
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