| 1) | 279 + 476 = | 2) | 160 + 288 = | 3) | 374 + 554 = |
| 4) | 72 − 808 = | 5) | 522 − 218 = | 6) | 772 + 278 = |
| 1) | 279 + 476 = 755 | 2) | 160 + 288 = 448 | 3) | 374 + 554 = 928 |
| 4) | 72 − 808 = -736 | 5) | 522 − 218 = 304 | 6) | 772 + 278 = 1050 |