题目内容
计算与化简:(1)2
| 3 |
| 3 | 1.5 |
| 6 | 12 |
(2)
| 5 |
| 6 |
| 1 |
| 3 |
| 1 |
| 2 |
| 2 |
| 3 |
| 1 |
| 2 |
分析:(1)根据根式的运算性质,我们易根据
=a
,am•an=am+n,(am)n=am•n,易计算出结果.
(2)根据根式的运算性质,我们易得到原式=
a
b-2•(-3a-
b-1)÷(2a
b-
),化简易计算出结果.
| a |
| 1 |
| 2 |
(2)根据根式的运算性质,我们易得到原式=
| 5 |
| 6 |
| 1 |
| 3 |
| 1 |
| 2 |
| 1 |
| 3 |
| 3 |
| 2 |
解答:解:(1)原式=2×3
×(
)
×12
=2×3
+
+
×2-
+2×
=6(7分)
(2)原式=
a
b-2•(-3a-
b-1)÷(2a
b-
)(10分)
=-
a
-
-
b-2-1+
=-
a-
b-
=-
(14分)
| 1 |
| 2 |
| 3 |
| 2 |
| 1 |
| 3 |
| 1 |
| 6 |
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 6 |
| 1 |
| 3 |
| 1 |
| 6 |
(2)原式=
| 5 |
| 6 |
| 1 |
| 3 |
| 1 |
| 2 |
| 1 |
| 3 |
| 3 |
| 2 |
=-
| 5 |
| 4 |
| 1 |
| 3 |
| 1 |
| 2 |
| 1 |
| 3 |
| 3 |
| 2 |
| 5 |
| 4 |
| 1 |
| 2 |
| 3 |
| 2 |
5
| ||
| 4ab2 |
点评:本题考查的知识点根式的化简运算,解答本题的关键是熟练掌握根式的运算性质.
练习册系列答案
相关题目