| 1) | 104 + 386 = | 2) | 424 + 882 = | 3) | -849 − 785 = |
| 4) | 343 − 195 = | 5) | 578 − 346 = | 6) | -836 + 581 = |
| 1) | 104 + 386 = 490 | 2) | 424 + 882 = 1306 | 3) | -849 − 785 = -1634 |
| 4) | 343 − 195 = 148 | 5) | 578 − 346 = 232 | 6) | -836 + 581 = -255 |