| • |
| 5 |
| • |
| 5 |
10x-x=5.55
| • |
| 5 |
| • |
| 5 |
解方程得
| 5 |
| 9 |
于是得：0.
| • |
| 5 |
| 5 |
| 9 |
（2）设0.
| • |
| 7 |
| • |
| 3 |
| • |
| 7 |
| • |
| 3 |
100x-x=73.73
| • |
| 7 |
| • |
| 3 |
| • |
| 7 |
| • |
| 3 |
解方程得
| 73 |
| 99 |
| • |
| 7 |
| • |
| 3 |
| 73 |
| 99 |
| 1 |
| 3 |
| • |
| 3 |
| • |
| 3 |
| 1 |
| 3 |
| • |
| 7 |
| • |
| 7 |
| • |
| 7 |
| 7 |
| 9 |
| • |
| 7 |
| 7 |
| 9 |
| • |
| 5 |
| • |
| 5 |
| • |
| 7 |
| • |
| 3 |
| • |
| 5 |
| • |
| 5 |
| • |
| 5 |
| • |
| 5 |
| 5 |
| 9 |
| • |
| 5 |
| 5 |
| 9 |
| • |
| 7 |
| • |
| 3 |
| • |
| 7 |
| • |
| 3 |
| • |
| 7 |
| • |
| 3 |
| • |
| 7 |
| • |
| 3 |
| 73 |
| 99 |
| • |
| 7 |
| • |
| 3 |
| 73 |
| 99 |