| 1) | -681 + 373 = | 2) | -983 + 108 = | 3) | -19 + 638 = |
| 4) | -45 + 571 = | 5) | -819 − 600 = | 6) | -586 − 728 = |
| 1) | -681 + 373 = -308 | 2) | -983 + 108 = -875 | 3) | -19 + 638 = 619 |
| 4) | -45 + 571 = 526 | 5) | -819 − 600 = -1419 | 6) | -586 − 728 = -1314 |