| 1) | 546 + 55 = | 2) | -850 + 407 = | 3) | 513 − 712 = |
| 4) | 65 + 991 = | 5) | 609 + 899 = | 6) | -841 − 568 = |
| 1) | 546 + 55 = 601 | 2) | -850 + 407 = -443 | 3) | 513 − 712 = -199 |
| 4) | 65 + 991 = 1056 | 5) | 609 + 899 = 1508 | 6) | -841 − 568 = -1409 |