| 1) | 843 + 148 = | 2) | 13 − 514 = | 3) | -551 + 276 = |
| 4) | -484 + 385 = | 5) | -323 + 605 = | 6) | 813 − 488 = |
| 1) | 843 + 148 = 991 | 2) | 13 − 514 = -501 | 3) | -551 + 276 = -275 |
| 4) | -484 + 385 = -99 | 5) | -323 + 605 = 282 | 6) | 813 − 488 = 325 |