| 1) | 649 + 643 = | 2) | 559 + 526 = | 3) | -532 − 694 = |
| 4) | 856 + 679 = | 5) | -691 − 754 = | 6) | 416 + 871 = |
| 1) | 649 + 643 = 1292 | 2) | 559 + 526 = 1085 | 3) | -532 − 694 = -1226 |
| 4) | 856 + 679 = 1535 | 5) | -691 − 754 = -1445 | 6) | 416 + 871 = 1287 |