31
I think it's 16.
-16 minus -9 is -7
-16-(-16)=0
-15 - (-15) = 0
-31
16 minus -11 is 27.
45 minus -16 is 61.
-15 minus -4 is -11.
If you mean 1130 minus 15 minus 16 then it is 1099
-4 minus -12 is 8.
negative 16
8 minus negative 15 is twenty three.23.you first add negative 15 + 8 and it is 23.that will give you the answer