| 1) | 598 + 665 = | 2) | 253 − 282 = | 3) | -259 + 340 = |
| 4) | 80 + 781 = | 5) | 748 + 409 = | 6) | 799 − 61 = |
| 1) | 598 + 665 = 1263 | 2) | 253 − 282 = -29 | 3) | -259 + 340 = 81 |
| 4) | 80 + 781 = 861 | 5) | 748 + 409 = 1157 | 6) | 799 − 61 = 738 |