题目内容
计算:
×(-
)÷
.
| 2 |
| 3 |
| 20 |
| 1 |
| 3 |
| 48 |
2
|
考点:二次根式的乘除法
专题:
分析:直接利用二次根式的乘除运算法则化简求出即可.
解答:解:
×(-
)÷
=
×(-
)×
=-
=-
×
=-
×
=-
.
| 2 |
| 3 |
| 20 |
| 1 |
| 3 |
| 48 |
2
|
=
| 4 |
| 3 |
| 5 |
| 4 |
| 3 |
| 3 |
|
=-
| 16 |
| 9 |
5×3×
|
=-
| 16 |
| 9 |
| 3 |
| 2 |
|
=-
| 8 |
| 3 |
| 1 |
| 2 |
| 10 |
=-
| 4 |
| 3 |
| 10 |
点评:此题主要考查了二次根式的乘除运算法则,正确化简二次根式是解题关键.
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