题目内容
计算:3| 18 |
| 1 |
| 5 |
| 50 |
|
分析:首先要熟练对各个二次根式进行化简:
=3
,
=5
,
=
,再进行计算.
| 18 |
| 2 |
| 50 |
| 2 |
|
| ||
| 2 |
解答:解:3
+
-4
=9
+
-2
=8
.
| 18 |
| 1 |
| 5 |
| 50 |
|
=9
| 2 |
| 2 |
| 2 |
=8
| 2 |
点评:二次根式加减运算的步骤:(1)把各个二次根式化成最简二次根式;(2)合并同类二次根式.
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| 1 |
| 5 |
| 50 |
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| 18 |
| 2 |
| 50 |
| 2 |
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| ||
| 2 |
| 18 |
| 1 |
| 5 |
| 50 |
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| 2 |
| 2 |
| 2 |
| 2 |