| 1) | 59 + 287 = | 2) | 486 + 281 = | 3) | -6 − 198 = |
| 4) | -838 − 9 = | 5) | -49 + 674 = | 6) | 227 + 496 = |
| 1) | 59 + 287 = 346 | 2) | 486 + 281 = 767 | 3) | -6 − 198 = -204 |
| 4) | -838 − 9 = -847 | 5) | -49 + 674 = 625 | 6) | 227 + 496 = 723 |