| 1) | -586 − 121 = | 2) | 94 + 642 = | 3) | 939 + 395 = |
| 4) | 453 − 991 = | 5) | 80 − 8 = | 6) | -651 + 656 = |
| 1) | -586 − 121 = -707 | 2) | 94 + 642 = 736 | 3) | 939 + 395 = 1334 |
| 4) | 453 − 991 = -538 | 5) | 80 − 8 = 72 | 6) | -651 + 656 = 5 |