题目内容
计算:1÷
÷
÷
÷
÷…÷
.
| 1 |
| 2 |
| 2 |
| 3 |
| 3 |
| 4 |
| 4 |
| 5 |
| 2005 |
| 2006 |
考点:分数的巧算
专题:计算问题(巧算速算)
分析:把除法变为乘法,约分计算,最后剩下2006.
解答:
解:1÷
÷
÷
÷
÷…÷
=1×2×
×
×
×…×
=2006.
| 1 |
| 2 |
| 2 |
| 3 |
| 3 |
| 4 |
| 4 |
| 5 |
| 2005 |
| 2006 |
=1×2×
| 3 |
| 2 |
| 4 |
| 3 |
| 5 |
| 4 |
| 2006 |
| 2005 |
=2006.
点评:注意数字转化,通过约分,进行简便计算.
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