| 1) | 869 + 60 = | 2) | 106 + 59 = | 3) | -870 + 840 = |
| 4) | 505 − 387 = | 5) | -705 − 401 = | 6) | 229 − 679 = |
| 1) | 869 + 60 = 929 | 2) | 106 + 59 = 165 | 3) | -870 + 840 = -30 |
| 4) | 505 − 387 = 118 | 5) | -705 − 401 = -1106 | 6) | 229 − 679 = -450 |