| 1) | -121 + 138 = | 2) | -449 + 294 = | 3) | -657 + 659 = |
| 4) | 383 + 596 = | 5) | -962 + 477 = | 6) | -380 + 1 = |
| 1) | -121 + 138 = 17 | 2) | -449 + 294 = -155 | 3) | -657 + 659 = 2 |
| 4) | 383 + 596 = 979 | 5) | -962 + 477 = -485 | 6) | -380 + 1 = -379 |