| 1) | 813 + 545 = | 2) | -62 − 593 = | 3) | -530 − 269 = |
| 4) | -523 + 176 = | 5) | 18 + 79 = | 6) | -491 + 248 = |
| 1) | 813 + 545 = 1358 | 2) | -62 − 593 = -655 | 3) | -530 − 269 = -799 |
| 4) | -523 + 176 = -347 | 5) | 18 + 79 = 97 | 6) | -491 + 248 = -243 |