| 1) | 881 + 653 = | 2) | -677 + 422 = | 3) | 251 + 889 = |
| 4) | -656 + 46 = | 5) | -246 − 657 = | 6) | -785 + 930 = |
| 1) | 881 + 653 = 1534 | 2) | -677 + 422 = -255 | 3) | 251 + 889 = 1140 |
| 4) | -656 + 46 = -610 | 5) | -246 − 657 = -903 | 6) | -785 + 930 = 145 |