| 1) | -144 + 799 = | 2) | -142 + 498 = | 3) | 251 + 682 = |
| 4) | 985 + 947 = | 5) | 373 − 634 = | 6) | 997 + 634 = |
| 1) | -144 + 799 = 655 | 2) | -142 + 498 = 356 | 3) | 251 + 682 = 933 |
| 4) | 985 + 947 = 1932 | 5) | 373 − 634 = -261 | 6) | 997 + 634 = 1631 |