| 1) | -158 − 838 = | 2) | 304 − 636 = | 3) | 828 − 245 = |
| 4) | -479 − 665 = | 5) | -885 + 940 = | 6) | -41 − 37 = |
| 1) | -158 − 838 = -996 | 2) | 304 − 636 = -332 | 3) | 828 − 245 = 583 |
| 4) | -479 − 665 = -1144 | 5) | -885 + 940 = 55 | 6) | -41 − 37 = -78 |