题目内容
计算:
+
-
-
= .
| 1 |
| 3 |
| 5 |
| 3 |
| 4 |
| 3 |
| 5 |
| 1 |
| 4 |
| 3 |
考点:二次根式的加减法
专题:
分析:直接合并同类二次根式进而求出即可.
解答:解:
+
-
-
=-
+
=-
+
.
故答案为:-
+
.
| 1 |
| 3 |
| 5 |
| 3 |
| 4 |
| 3 |
| 5 |
| 1 |
| 4 |
| 3 |
=-
| 2 |
| 3 |
| 5 |
| 1 |
| 2 |
| 3 |
=-
2
| ||
| 3 |
| ||
| 2 |
故答案为:-
2
| ||
| 3 |
| ||
| 2 |
点评:此题主要考查了二次根式的加减运算,正确合并同类二次根式是解题关键.
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