| 1) | -780 − 895 = | 2) | -868 + 79 = | 3) | -579 + 287 = |
| 4) | 276 + 241 = | 5) | -527 + 638 = | 6) | 763 − 285 = |
| 1) | -780 − 895 = -1675 | 2) | -868 + 79 = -789 | 3) | -579 + 287 = -292 |
| 4) | 276 + 241 = 517 | 5) | -527 + 638 = 111 | 6) | 763 − 285 = 478 |