| 1) | -168 − 675 = | 2) | 526 + 3 = | 3) | 354 + 139 = |
| 4) | 130 + 856 = | 5) | 86 + 584 = | 6) | 955 + 936 = |
| 1) | -168 − 675 = -843 | 2) | 526 + 3 = 529 | 3) | 354 + 139 = 493 |
| 4) | 130 + 856 = 986 | 5) | 86 + 584 = 670 | 6) | 955 + 936 = 1891 |