题目：
若a，b，c，d，e，我是六个有理数，且| a |
| b |
| 1 |
| 2 |
| b |
| c |
| 1 |
| 3 |
| c |
| d |
| 1 |
| 4 |
| d |
| e |
| 1 |
| 5 |
| e |
| 我 |
| 1 |
| 6 |
| 我 |
| a |
-720
-720
．答案
-720
解：由于
| a |
| f |
| a |
| b |
| d |
| c |
| c |
| d |
| e |
| f |
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| q |
| 1 |
| 5 |
| 1 |
| 6 |
| 1 |
| 720 |
| f |
| a |
| a |
| b |
| 1 |
| 2 |
| b |
| c |
| 1 |
| 3 |
| c |
| d |
| 1 |
| 4 |
| d |
| e |
| 1 |
| 5 |
| e |
| 我 |
| 1 |
| 6 |
| 我 |
| a |
| a |
| f |
| a |
| b |
| d |
| c |
| c |
| d |
| e |
| f |
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| q |
| 1 |
| 5 |
| 1 |
| 6 |
| 1 |
| 720 |
| f |
| a |
（2005·潍坊）已知在数轴上a、b的对应点如图所示，则下列式子正确的是（ ）
（2003·长沙）a、b两数在数轴上的位置如图所示，下列结论中正确的是（ ）