| 567+345×566 |
| 567×345+222 |
=
| 567+345×566 |
| (566+1)×345+222 |
=
| 567+345×566 |
| 345×566+345+222 |
=
| 567+345×566 |
| 345×566+567 |
=
| 567+345×566 |
| 567+345×566 |
=1.
| 567+345×566 |
| 567×345+222 |
| 567+345×566 |
| 567×345+222 |
| 567+345×566 |
| (566+1)×345+222 |
| 567+345×566 |
| 345×566+345+222 |
| 567+345×566 |
| 345×566+567 |
| 567+345×566 |
| 567+345×566 |