题目内容
计算题
(1)
-5
+6
(2)(5
-6
+4
)÷
(3)
+
-(
-1)0
(4)
-(3
-2
)(3
+2
)
(5)(
+1)(2-
)
(6)(
-
)÷
(7)3(
-π)0-
+(-1)2013
(8)(-3)0-
+|1-
|+
(9)
÷
-
×
+
.
(1)
| 32 |
|
|
(2)(5
| 48 |
| 27 |
| 15 |
| 3 |
(3)
| 2 | ||
|
| 27 |
| 3 |
(4)
| ||
|
| 2 |
| 3 |
| 2 |
| 3 |
(5)(
| 2 |
| 2 |
(6)(
| 50 |
| 8 |
| 2 |
(7)3(
| 3 |
| ||||
|
(8)(-3)0-
| 27 |
| 2 |
| 1 | ||||
|
(9)
| 48 |
| 3 |
|
| 12 |
| 24 |
考点:二次根式的混合运算
专题:
分析:(1)直接化简二次根式,进而合并即可;
(2)直接化简二次根式,进而合并,再利用二次根式除法运算求出即可;
(3)直接化简二次根式,进而合并即可;
(4)首先化简各二次根式,进而乘法运算法则求出即可;
(5)直接利用整式运算法则,进而求出即可;
(6)首先化简二次根式,进而求出即可;
(7)利用零指数幂的性质以及二次根式的性质化简求出即可;
(8)利用零指数幂的性质以及二次根式的性质化简求出即可;
(9)利用二次根式混合运算法则化简进而求出即可.
(2)直接化简二次根式,进而合并,再利用二次根式除法运算求出即可;
(3)直接化简二次根式,进而合并即可;
(4)首先化简各二次根式,进而乘法运算法则求出即可;
(5)直接利用整式运算法则,进而求出即可;
(6)首先化简二次根式,进而求出即可;
(7)利用零指数幂的性质以及二次根式的性质化简求出即可;
(8)利用零指数幂的性质以及二次根式的性质化简求出即可;
(9)利用二次根式混合运算法则化简进而求出即可.
解答:解:(1)
-5
+6
=4
-
+
=3
;
(2)(5
-6
+4
)÷
=(20
-18
+4
)×
=(2
+4
)×
=2+4
;
(3)
+
-(
-1)0
=
+3
-1
=
+1+3
-1
=4
;
(4)
-(3
-2
)(3
+2
)
=
-[(3
)2-(2
)2]
=2+
-(18-12)
=
-4;
(5)(
+1)(2-
)=2
-2+2-
=
;
(6)(
-
)÷
=(5
-2
)÷
=3;
(7)3(
-π)0-
+(-1)2013
=3-(2-
)-1
=
;
(8)(-3)0-
+|1-
|+
=1-3
+
-1+
-
=-2
;
(9)
÷
-
×
+
=4-
+2
=4+
.
| 32 |
|
|
| 2 |
5
| ||
| 2 |
3
| ||
| 2 |
| 2 |
(2)(5
| 48 |
| 27 |
| 15 |
| 3 |
=(20
| 3 |
| 3 |
| 15 |
| ||
| 3 |
=(2
| 3 |
| 15 |
| ||
| 3 |
=2+4
| 5 |
(3)
| 2 | ||
|
| 27 |
| 3 |
=
2(
| ||||
(
|
| 3 |
=
| 3 |
| 3 |
=4
| 3 |
(4)
| ||
|
| 2 |
| 3 |
| 2 |
| 3 |
=
(
| ||
| 2 |
| 2 |
| 3 |
=2+
| 3 |
=
| 3 |
(5)(
| 2 |
| 2 |
| 2 |
| 2 |
| 2 |
(6)(
| 50 |
| 8 |
| 2 |
| 2 |
| 2 |
| 2 |
(7)3(
| 3 |
| ||||
|
=3-(2-
| 3 |
=
| 3 |
(8)(-3)0-
| 27 |
| 2 |
| 1 | ||||
|
=1-3
| 3 |
| 2 |
| 3 |
| 2 |
=-2
| 3 |
(9)
| 48 |
| 3 |
|
| 12 |
| 24 |
=4-
| 6 |
| 6 |
=4+
| 6 |
点评:此题主要考查了二次根式的混合运算,正确化简二次根式是解题关键.
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