题目内容
把0.3
、0.3
、0.
2
、0.3 2
、0.328按从小到大的顺序排列起来
| . |
| 8 |
| . |
| 2 |
| . |
| 2 |
| . |
| 8 |
| . |
| 3 |
| . |
| 8 |
| . |
| 8 |
0.328<0.3
<0.
2
<0.3 2
<0.3
.
| . |
| 2 |
| . |
| 8 |
| . |
| 3 |
| . |
| 8 |
| . |
| 8 |
| . |
| 8 |
| . |
| 2 |
0.328<0.3
<0.
2
<0.3 2
<0.3
.
.| . |
| 2 |
| . |
| 8 |
| . |
| 3 |
| . |
| 8 |
| . |
| 8 |
| . |
| 8 |
| . |
| 2 |
分析:写出循环小数的两个循环节,然后运用小数比较大小的方法进行比较求解.
解答:解:0.3
=0.38282…;
0.3
=0.32828…;
0.
2
=0.328328…;
0.3 2
=0.32888…;
0.328=0.328,
因为0.328<0.32828<0.328328<0.32888<0.38282,
所以0.328<0.3
<0.
2
<0.3 2
<0.3
.
故答案为:0.328<0.3
<0.
2
<0.3 2
<0.3
.
| . |
| 8 |
| . |
| 2 |
0.3
| . |
| 2 |
| . |
| 8 |
0.
| . |
| 3 |
| . |
| 8 |
0.3 2
| . |
| 8 |
0.328=0.328,
因为0.328<0.32828<0.328328<0.32888<0.38282,
所以0.328<0.3
| . |
| 2 |
| . |
| 8 |
| . |
| 3 |
| . |
| 8 |
| . |
| 8 |
| . |
| 8 |
| . |
| 2 |
故答案为:0.328<0.3
| . |
| 2 |
| . |
| 8 |
| . |
| 3 |
| . |
| 8 |
| . |
| 8 |
| . |
| 8 |
| . |
| 2 |
点评:此题综合考查循环小数和小数的大小比较,根据循环节的意义往下写出小数后比较.
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