| 1) | 9 + 10 = | 2) | 2 + 6 = | 3) | 1 + 4 = | 4) | 10 − 10 = |
| 5) | -9 − 9 = | 6) | -3 − 7 = | 7) | -9 + 7 = | 8) | -7 − 5 = |
| 1) | 9 + 10 = 19 | 2) | 2 + 6 = 8 | 3) | 1 + 4 = 5 | 4) | 10 − 10 = 0 |
| 5) | -9 − 9 = -18 | 6) | -3 − 7 = -10 | 7) | -9 + 7 = -2 | 8) | -7 − 5 = -12 |