| 1) | 641 − 260 = | 2) | -335 − 437 = | 3) | 568 + 171 = |
| 4) | -367 + 373 = | 5) | -845 + 134 = | 6) | -312 + 756 = |
| 1) | 641 − 260 = 381 | 2) | -335 − 437 = -772 | 3) | 568 + 171 = 739 |
| 4) | -367 + 373 = 6 | 5) | -845 + 134 = -711 | 6) | -312 + 756 = 444 |