| 1) | -622 − 253 = | 2) | 904 − 555 = | 3) | -940 − 921 = |
| 4) | -38 − 317 = | 5) | 489 − 709 = | 6) | 52 + 678 = |
| 1) | -622 − 253 = -875 | 2) | 904 − 555 = 349 | 3) | -940 − 921 = -1861 |
| 4) | -38 − 317 = -355 | 5) | 489 − 709 = -220 | 6) | 52 + 678 = 730 |