00:00:00
-14
- -8 + -6 =
+12
- +20 – (+8) =
-100
- (-10) x (+10) =
+20
- (+40) / (+2) =
-2
- +9 + (-11) =
+9
- +7 – (-2) =
-24
- (-4) x (+6) =
+6
- (+42) / (+7) =
-90
- -75 + (-15) =