| 1) | 717 − 986 = | 2) | 291 + 341 = | 3) | 478 + 178 = |
| 4) | -875 + 846 = | 5) | 886 − 706 = | 6) | 659 + 766 = |
| 1) | 717 − 986 = -269 | 2) | 291 + 341 = 632 | 3) | 478 + 178 = 656 |
| 4) | -875 + 846 = -29 | 5) | 886 − 706 = 180 | 6) | 659 + 766 = 1425 |