| 1) | 73 − 957 = | 2) | -827 − 247 = | 3) | -777 + 6 = |
| 4) | 391 + 773 = | 5) | 885 + 417 = | 6) | -748 + 157 = |
| 1) | 73 − 957 = -884 | 2) | -827 − 247 = -1074 | 3) | -777 + 6 = -771 |
| 4) | 391 + 773 = 1164 | 5) | 885 + 417 = 1302 | 6) | -748 + 157 = -591 |