| 1) | -513 + 454 = | 2) | -822 − 756 = | 3) | -880 + 518 = |
| 4) | 137 + 857 = | 5) | 23 − 376 = | 6) | -845 − 663 = |
| 1) | -513 + 454 = -59 | 2) | -822 − 756 = -1578 | 3) | -880 + 518 = -362 |
| 4) | 137 + 857 = 994 | 5) | 23 − 376 = -353 | 6) | -845 − 663 = -1508 |