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Anonymous
-18
Raquel Considine ∙
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-30 - (-12) = -30 + 12 = -18
Wiki User
It is: 30 minus 12 = 18
Negative 18 minus positive 12 is negative 30.
-30 - (-24) = -30 + 24 = -6
minus 21 think of it as 12+9 which equals 21 then just whack a minus sign infront
-12 minus -6 is -6
3 minus -9 is 12.