| 1) | 1 − 9 = | 2) | 9 − 4 = | 3) | 10 − 4 = | 4) | -3 − 9 = |
| 5) | -1 − 8 = | 6) | -6 − 8 = | 7) | 5 + 4 = | 8) | -4 + 3 = |
| 1) | 1 − 9 = -8 | 2) | 9 − 4 = 5 | 3) | 10 − 4 = 6 | 4) | -3 − 9 = -12 |
| 5) | -1 − 8 = -9 | 6) | -6 − 8 = -14 | 7) | 5 + 4 = 9 | 8) | -4 + 3 = -1 |