题目内容
化循环小数为分数:0.2
=
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| 116 |
| 495 |
| 116 |
| 495 |
分析:0.2
×10=2.
,0.2
×1000=234.
,两式相减,即可得到结论.
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解答:解:∵0.2
×10=2.
,0.2
×1000=234.
∴0.2
×1000-0.2
×10=232
∴0.2
×990=232
∴0.2
=
=
故答案为:
| • |
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| 3 |
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∴0.2
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∴0.2
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∴0.2
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| 232 |
| 990 |
| 116 |
| 495 |
故答案为:
| 116 |
| 495 |
点评:本题考查混循环小数的小数部分化成分数,解题的关键是构造两个等式,作差求解,属于基础题.
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