| 1) | -159 + 306 = | 2) | -296 − 79 = | 3) | -880 − 133 = |
| 4) | 595 − 113 = | 5) | 525 − 536 = | 6) | -974 − 115 = |
| 1) | -159 + 306 = 147 | 2) | -296 − 79 = -375 | 3) | -880 − 133 = -1013 |
| 4) | 595 − 113 = 482 | 5) | 525 − 536 = -11 | 6) | -974 − 115 = -1089 |