| 1) | -605 − 426 = | 2) | 599 + 652 = | 3) | 453 + 868 = |
| 4) | 805 − 395 = | 5) | 519 + 357 = | 6) | 983 + 434 = |
| 1) | -605 − 426 = -1031 | 2) | 599 + 652 = 1251 | 3) | 453 + 868 = 1321 |
| 4) | 805 − 395 = 410 | 5) | 519 + 357 = 876 | 6) | 983 + 434 = 1417 |