| 1) | 258 + 456 = | 2) | 735 + 629 = | 3) | -635 − 786 = |
| 4) | 945 + 998 = | 5) | -960 − 545 = | 6) | -802 − 161 = |
| 1) | 258 + 456 = 714 | 2) | 735 + 629 = 1364 | 3) | -635 − 786 = -1421 |
| 4) | 945 + 998 = 1943 | 5) | -960 − 545 = -1505 | 6) | -802 − 161 = -963 |