| 1) | 626 + 905 = | 2) | -742 + 525 = | 3) | -564 − 84 = |
| 4) | 843 − 675 = | 5) | -604 + 63 = | 6) | -918 − 412 = |
| 1) | 626 + 905 = 1531 | 2) | -742 + 525 = -217 | 3) | -564 − 84 = -648 |
| 4) | 843 − 675 = 168 | 5) | -604 + 63 = -541 | 6) | -918 − 412 = -1330 |