| 1) | -671 + 396 = | 2) | -100 − 391 = | 3) | 326 + 724 = |
| 4) | -350 + 105 = | 5) | -789 + 861 = | 6) | -98 − 231 = |
| 1) | -671 + 396 = -275 | 2) | -100 − 391 = -491 | 3) | 326 + 724 = 1050 |
| 4) | -350 + 105 = -245 | 5) | -789 + 861 = 72 | 6) | -98 − 231 = -329 |