题目
题型:解答题难度:简单来源:不详
1)、
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821005426-13176.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821005427-38315.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821005427-89109.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821005427-35648.png)
2)、8x
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821005427-32259.png)
3)、(3
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821005427-68795.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821005428-45096.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821005428-33457.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821005428-89007.png)
4)、(3+
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821005428-86178.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821005428-73792.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821005428-86178.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821005428-79575.png)
5)、
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821005429-23464.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821005429-72084.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821005429-59792.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821005427-32259.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821005429-59948.png)
6)、
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821005429-15577.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821005430-45535.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821005430-89843.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821005430-14135.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821005430-27166.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821005428-89007.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821005430-66652.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821005431-16604.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821005428-86178.png)
5、-23 6、
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821005431-31718.png)
解析
试题分析:(1)
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821005426-13176.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821005427-38315.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821005427-89109.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821005427-35648.png)
=
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821005431-78366.png)
=
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821005430-27166.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821005428-89007.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821005430-66652.png)
(2)8x
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821005427-32259.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821005431-15346.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821005431-92855.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821005432-90362.png)
(3)(3
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821005427-68795.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821005428-45096.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821005428-33457.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821005428-89007.png)
=
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821005432-54818.png)
=
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821005432-94090.png)
= 18-48
= -30
(4)(3+
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821005428-86178.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821005428-73792.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821005428-86178.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821005428-79575.png)
=
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821005432-32085.png)
=
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821005432-57995.png)
=-3-
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821005428-86178.png)
(5)
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821005429-23464.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821005429-72084.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821005429-59792.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821005427-32259.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821005429-59948.png)
=
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821005433-32406.png)
=
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821005433-21195.png)
=
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821005433-83643.png)
(6)
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821005429-15577.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821005430-45535.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821005430-89843.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821005430-14135.png)
=
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821005434-54665.png)
=
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821005431-31718.png)
点评:难度系数中等,巧妙利用平方差公式,提取公因式,开方等技巧进行有理数的运算,过程要小心谨慎,注意正负数和化简过程不要出错。
核心考点
试题【计算(每小题4分,共24分)1)、++-2)、8x+125=03)、(3+)(-4)4)、(3+)(3-)5)、-()+(-2)÷3 6)、+++】;主要考察你对二次根式加减等知识点的理解。[详细]
举一反三
A.![]() | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821005423-70565.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821005421-39608.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821005421-41774.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821005420-50670.png)
A.4 | B.- 4 | C.±4 | D.8 |
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821005417-82086.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821005417-49693.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190821/20190821005418-87986.png)
A.0个 | B.1个 | C.2个 | D.3个 |
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