| 1) | 188 + 809 = | 2) | -191 + 183 = | 3) | -623 + 995 = |
| 4) | -11 + 586 = | 5) | -435 + 621 = | 6) | 868 − 833 = |
| 1) | 188 + 809 = 997 | 2) | -191 + 183 = -8 | 3) | -623 + 995 = 372 |
| 4) | -11 + 586 = 575 | 5) | -435 + 621 = 186 | 6) | 868 − 833 = 35 |