| 1) | 594 + 587 = | 2) | -342 + 113 = | 3) | 423 + 745 = |
| 4) | 403 − 562 = | 5) | 357 − 559 = | 6) | -518 − 788 = |
| 1) | 594 + 587 = 1181 | 2) | -342 + 113 = -229 | 3) | 423 + 745 = 1168 |
| 4) | 403 − 562 = -159 | 5) | 357 − 559 = -202 | 6) | -518 − 788 = -1306 |