-13 minus -13 is 0.
-8 - (-13) = - 8 + 13 = +5 ( minus a minus is a plus)
Negative 6 minus 7 is Minus 13!
-13 minus -4 is -9
-15 - (-15) = 0
Negative 13 is.
-39 minus -26 is -13
13
-15 minus -4 is -11.
-9 minus -4 is -5
-13-(-50)= -13+50= 37
Whenever you minus a negative (number), you add. So it would be 104 - (-13), or 104 + 13, which is 117