题目内容
求下列各式的值:(1)-
|
(2)
| 3 | -0.008 |
(3)-
(-
|
(4)
| 3 | -1 |
| (-1)2 |
(5)
| 3 |
| 3 |
(6)
| 2 |
| 2 |
| 1 | ||
|
(7)2|
| 2 |
| 3 |
| 2 |
(8)(-5
| 2 |
| 3 | 5 |
分析:根据二次根式的化简方法或运算法则计算即可.
解答:解:
(1)原式=-
=-
;
(2)原式=
=-0.2;
(3)原式=-
=-
;
(4)原式=-1+1=0;
(5)原式=
•
-
×3=3-3
;
(6)原式=
×
-
×
=2-1=1;
(7)原式=2(
-
)+2
=2
;
(8)原式=50-10=40.
(1)原式=-
|
| 7 |
| 13 |
(2)原式=
| 3 | (-0.2)3 |
(3)原式=-
(
|
| 4 |
| 13 |
(4)原式=-1+1=0;
(5)原式=
| 3 |
| 3 |
| 3 |
| 3 |
(6)原式=
| 2 |
| 2 |
| 2 |
| 1 | ||
|
(7)原式=2(
| 3 |
| 2 |
| 2 |
| 3 |
(8)原式=50-10=40.
点评:此题主要考查了二次根式的运算法则,乘法法则:
•
=
,除法法则:
=
.
| a |
| b |
| ab |
|
| ||
|
练习册系列答案
相关题目