| 1) | 423 + 683 = | 2) | 860 − 218 = | 3) | 785 − 877 = |
| 4) | 196 + 331 = | 5) | -78 + 678 = | 6) | 624 + 882 = |
| 1) | 423 + 683 = 1106 | 2) | 860 − 218 = 642 | 3) | 785 − 877 = -92 |
| 4) | 196 + 331 = 527 | 5) | -78 + 678 = 600 | 6) | 624 + 882 = 1506 |