| 1) | -399 − 596 = | 2) | -403 − 363 = | 3) | -968 + 878 = |
| 4) | 543 + 599 = | 5) | 287 − 905 = | 6) | 962 + 865 = |
| 1) | -399 − 596 = -995 | 2) | -403 − 363 = -766 | 3) | -968 + 878 = -90 |
| 4) | 543 + 599 = 1142 | 5) | 287 − 905 = -618 | 6) | 962 + 865 = 1827 |