| 1) | 457 − 450 = | 2) | -498 − 999 = | 3) | -968 + 828 = |
| 4) | -946 + 51 = | 5) | 426 + 367 = | 6) | -980 + 971 = |
| 1) | 457 − 450 = 7 | 2) | -498 − 999 = -1497 | 3) | -968 + 828 = -140 |
| 4) | -946 + 51 = -895 | 5) | 426 + 367 = 793 | 6) | -980 + 971 = -9 |