| 1) | 543 + 72 = | 2) | -413 + 194 = | 3) | -195 − 177 = |
| 4) | 550 − 409 = | 5) | 345 + 664 = | 6) | -885 + 684 = |
| 1) | 543 + 72 = 615 | 2) | -413 + 194 = -219 | 3) | -195 − 177 = -372 |
| 4) | 550 − 409 = 141 | 5) | 345 + 664 = 1009 | 6) | -885 + 684 = -201 |