1. 48 ? -8 = -6
48/ -8 = -6
2. -40 ? 8 = -5
-40/ 8 = -5
3. 12 ? -2 = 14
12 - (-2) = 14
12 + 2 = 14
4. 18 ? -12 = 6
18 + (-12) = 6
18 - 12 = 6
5. 18 ? -20 = -2
18 + (-20) = -2
18 - 20 = -2
6. 22 ? -0.5 = -11
22 * -0.5 = -11
22 / -2 = -11
You just have to check your work :)