9 - (-9) = 9 + 9 = 18
-16 minus -9 is -7
-9 minus -4 is -5
negative 9 -9
Negative 18.
-18 minus 9 is -27
-11 minus -20 is 9
-9 minus -5 is -4
negative 9 divided by negative 3 is 3 andnegative 3 minus 1 is negative 2
-13 minus -4 is -9
0 minus -9 is 9
-9 - -9 = 0
4