题目内容
计算:(| 54 |
| 0.5 |
|
|
| 2 |
分析:先将二次根式化为最简,然后去括号合并可得出答案.
解答:解:原式=(3
-
+
)-(4
-
)
=3
-
+
-4
+
=
.
| 6 |
| ||
| 2 |
| 6 |
| 6 |
| 2 |
=3
| 6 |
| ||
| 2 |
| 6 |
| 6 |
| 2 |
=
| 1 |
| 2 |
| 2 |
点评:本题考查二次根式的加减运算,难度不大,注意在计算时要先化为最简,这样会简化运算.
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计算:(| 54 |
| 0.5 |
|
|
| 2 |
| 6 |
| ||
| 2 |
| 6 |
| 6 |
| 2 |
| 6 |
| ||
| 2 |
| 6 |
| 6 |
| 2 |
| 1 |
| 2 |
| 2 |