-4 minus -12 is 8.
16
-12 - 4 = -16
-16 minus -9 is -7
-16-(-16)=0
16
Negative 18 minus positive 12 is negative 30.
-12 minus -6 is -6
45 minus -16 is 61.
16 minus -11 is 27.
Negative 8 minus 12 is negative 20.
-12 * * * * * Wrong! -4 minus -8 = -4 + 8 = +4