| 1) | -280 − 918 = | 2) | 32 + 204 = | 3) | 74 + 137 = |
| 4) | -544 − 173 = | 5) | 912 − 946 = | 6) | 719 + 687 = |
| 1) | -280 − 918 = -1198 | 2) | 32 + 204 = 236 | 3) | 74 + 137 = 211 |
| 4) | -544 − 173 = -717 | 5) | 912 − 946 = -34 | 6) | 719 + 687 = 1406 |