题目内容
把下列分数化成小数.
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分析:把分数化成小数,根据分数与除法之间的联系,用分子除以分母即可.
解答:解:
=2÷5=0.4;
=4÷5=0.8;
=1÷8=0.125;
=4÷25=0.16;
=3÷4=0.75;
=1÷2=0.5;
=1÷4=0.25;
=1÷5=0.2;
=1÷40=0.025;
=1÷25=0.04;
| 2 |
| 5 |
| 4 |
| 5 |
| 1 |
| 8 |
| 4 |
| 25 |
| 3 |
| 4 |
| 1 |
| 2 |
| 1 |
| 4 |
| 1 |
| 5 |
| 1 |
| 40 |
| 1 |
| 25 |
点评:此题考查的目的是掌握分数化成小数的方法.
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