| 1) | 504 + 115 = | 2) | -779 − 400 = | 3) | 426 + 523 = |
| 4) | -436 + 129 = | 5) | 440 − 393 = | 6) | -938 + 693 = |
| 1) | 504 + 115 = 619 | 2) | -779 − 400 = -1179 | 3) | 426 + 523 = 949 |
| 4) | -436 + 129 = -307 | 5) | 440 − 393 = 47 | 6) | -938 + 693 = -245 |