-20
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The sum of 8 and -12 is -4.
Negative 8 minus 12 is negative 20.
The sum of 8 and 4 is 12. In mathematics, addition is the operation of combining two or more numbers to find their total. In this case, when you add 8 and 4 together, you get the sum of 12.
They will be negative numbers as for example -5+(-7) = -12
The sum of -10 and -2 is -12.