-18 + 100 is the same as 100 - 18.
-2 + (-18) = -20
100 - -18 =118
Since minus a negative is the same as a plus, then 18 - (-18) is the same as 18+18 = 36
-100 + 200 = 100
-18 + 16 = -2
(-0.75) + 18 = 17.25
-11 + (-7) = -18
-12 + 18 - (-15) = -12 + 18 +15 = 21
-14
3
18
Negative 23 + 32 minus 18 = negative 9 {-23+32-18=-9)