题目内容
1-
-
-
-
=
| 1 |
| 10 |
| 1 |
| 100 |
| 1 |
| 1000 |
| 1 |
| 10000 |
分析:把分数化成小数,再根据连减的性质进行计算.
解答:解:
1-
-
-
-
,
=1-0.1-0.01-0.001-0.0001,
=1-(0.1+0.01+0.001+0.0001),
=1-0.1111,
=0.8889.
1-
| 1 |
| 10 |
| 1 |
| 100 |
| 1 |
| 1000 |
| 1 |
| 10000 |
=1-0.1-0.01-0.001-0.0001,
=1-(0.1+0.01+0.001+0.0001),
=1-0.1111,
=0.8889.
点评:关键是把分数化成小数,再根据连减的性质进行简算.
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