| 1) | 364 − 434 = | 2) | 562 + 915 = | 3) | 68 + 445 = |
| 4) | 941 + 817 = | 5) | 478 + 756 = | 6) | 816 + 880 = |
| 1) | 364 − 434 = -70 | 2) | 562 + 915 = 1477 | 3) | 68 + 445 = 513 |
| 4) | 941 + 817 = 1758 | 5) | 478 + 756 = 1234 | 6) | 816 + 880 = 1696 |