| 1) | -9 − 331 = | 2) | -638 − 89 = | 3) | -830 + 550 = |
| 4) | -848 − 754 = | 5) | -715 − 945 = | 6) | 260 + 204 = |
| 1) | -9 − 331 = -340 | 2) | -638 − 89 = -727 | 3) | -830 + 550 = -280 |
| 4) | -848 − 754 = -1602 | 5) | -715 − 945 = -1660 | 6) | 260 + 204 = 464 |