| 1) | 756 + 338 = | 2) | -434 + 811 = | 3) | 570 + 660 = |
| 4) | -509 − 217 = | 5) | 786 + 559 = | 6) | 72 − 610 = |
| 1) | 756 + 338 = 1094 | 2) | -434 + 811 = 377 | 3) | 570 + 660 = 1230 |
| 4) | -509 − 217 = -726 | 5) | 786 + 559 = 1345 | 6) | 72 − 610 = -538 |