| 1) | -660 − 403 = | 2) | 709 + 712 = | 3) | 458 + 267 = |
| 4) | -586 − 167 = | 5) | 889 + 481 = | 6) | 762 + 173 = |
| 1) | -660 − 403 = -1063 | 2) | 709 + 712 = 1421 | 3) | 458 + 267 = 725 |
| 4) | -586 − 167 = -753 | 5) | 889 + 481 = 1370 | 6) | 762 + 173 = 935 |