题目内容
| 3 |
| 20 |
| 20 |
| 3 |
| 20 |
| 3 |
| 4 |
| 9 |
| 9 |
| 4 |
| 9 |
| 4 |
| 1 |
| 4 |
| 1 |
| 4 |
分析:根据倒数的意义可知,乘积是1的两个数互为数倒,乘它们各自的倒数即可解答.
解答:解:
×
=1;
×
=1;
×4=1;
所以
×
=
×
=
×4=1;
故答案为:
,
,
.
| 3 |
| 20 |
| 20 |
| 3 |
| 4 |
| 9 |
| 9 |
| 4 |
| 1 |
| 4 |
所以
| 3 |
| 20 |
| 20 |
| 3 |
| 4 |
| 9 |
| 9 |
| 4 |
| 1 |
| 4 |
故答案为:
| 20 |
| 3 |
| 9 |
| 4 |
| 1 |
| 4 |
点评:重点考查倒数的意义,互为倒数的两个数乘积是1.
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