| 1) | -968 − 923 = | 2) | 587 + 32 = | 3) | -899 − 412 = |
| 4) | 442 + 20 = | 5) | -328 − 188 = | 6) | -355 − 436 = |
| 1) | -968 − 923 = -1891 | 2) | 587 + 32 = 619 | 3) | -899 − 412 = -1311 |
| 4) | 442 + 20 = 462 | 5) | -328 − 188 = -516 | 6) | -355 − 436 = -791 |