| 1) | -213 − 12 = | 2) | -990 + 16 = | 3) | -337 + 553 = |
| 4) | 287 + 813 = | 5) | -809 + 271 = | 6) | 70 + 928 = |
| 1) | -213 − 12 = -225 | 2) | -990 + 16 = -974 | 3) | -337 + 553 = 216 |
| 4) | 287 + 813 = 1100 | 5) | -809 + 271 = -538 | 6) | 70 + 928 = 998 |