+15 - (-3) = 15 + 3 = 18
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- 3 - 12 = -15
Positive 3 plus negative 5 minus negative 2 minus positive 4 is equal to -4.
negative 20
It depends. (a) a positive minus a smaller positive is positive, (b) a positive minus a positive of the same size is zero, and (c) a positive minus a bigger positive is negative. For example, (a) 8 - 6 = 2 (b) 8 - 8 = 0 (c) 8 - 11 = -3
3 minus -9 is 12.