| 1) | 452 + 839 = | 2) | 42 − 736 = | 3) | -991 − 573 = |
| 4) | 557 + 53 = | 5) | 141 + 546 = | 6) | -60 − 269 = |
| 1) | 452 + 839 = 1291 | 2) | 42 − 736 = -694 | 3) | -991 − 573 = -1564 |
| 4) | 557 + 53 = 610 | 5) | 141 + 546 = 687 | 6) | -60 − 269 = -329 |