题目内容
计算:(1)
| 1 |
| 2 |
| 3 |
| 2 |
| 3 |
| 4 |
| 2 |
| 27 |
(2)(
| 48 |
| 1 |
| 4 |
| 6 |
| 27 |
分析:(1)(2)先把二次根式化简,再根据实数的运算法则依次进行计算即可求解.
解答:解:(1)原式=
+
-
-3
=
+
-3
=
-
=-
-
;
(2)原式=(4
+
)÷3
=
+
=
+
.
| ||
| 2 |
| ||
| 2 |
3
| ||
| 4 |
| 3 |
=
| ||
| 2 |
2
| ||||
| 4 |
| 3 |
=
| ||||
| 2 |
| ||
| 4 |
=-
| 5 |
| 2 |
| 3 |
| 1 |
| 4 |
| 2 |
(2)原式=(4
| 3 |
| 1 |
| 4 |
| 6 |
| 3 |
=
4
| ||
3
|
| ||||
3
|
=
| 4 |
| 3 |
| 1 |
| 12 |
| 2 |
点评:此题主要考查了实数的运算能力,解答此题的关键是熟知实数的运算法则,都是基础知识.
练习册系列答案
相关题目