题目
题型:解答题难度:一般来源:期末题
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817184006-48072.png)
(2)(+5)+(﹣7)=( );
(3)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817184006-44259.png)
(4)7a2b+2a2b=( );
(5)3xy2﹣7xy2=( );
(6)x﹣[3x﹣2(1+2x)]=( );
(7)﹣{﹣[﹣(2x﹣3y)]}=( ).
(8)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817184006-84830.png)
(9)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817184007-30724.png)
(10)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817184007-27443.png)
(11)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817184007-20593.png)
(12)﹣32﹣(﹣3)2+(﹣3)2×(﹣
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817184007-60699.png)
(13)﹣32×(﹣
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817184008-69963.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817184008-28196.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817184008-29636.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817184008-45534.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817184009-62322.png)
(2)﹣2;
(3)﹣2;
(4)9a2b;
(5)﹣4xy2;
(6)2x+2;
(7)﹣2x+3y;
(8)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817184009-66253.png)
(﹣2)÷(
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817184009-37590.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817184009-28784.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817184009-76583.png)
=(﹣2)×32×
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817184010-89924.png)
=﹣400+5,
=﹣395;
(9)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817184010-16977.png)
=﹣1+
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817184010-23815.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817184010-71103.png)
=﹣1+
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817184011-65818.png)
=
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817184011-32421.png)
(10)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817184011-45311.png)
=(﹣13)×(
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817184011-43359.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817184011-12149.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817184012-73627.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817184032-92581.png)
=﹣13﹣0.34,
=﹣13.34;
(11)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817184032-13081.png)
=0.29+[(
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817184032-99731.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817184033-10559.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817184033-76175.png)
=0.29+9÷(﹣
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817184033-47804.png)
=1﹣
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817184033-44818.png)
=﹣
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817184033-61005.png)
(12)﹣32﹣(﹣3)2+(﹣3)2×(﹣
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817184034-68528.png)
=﹣9﹣9+9×(﹣
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817184034-62262.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817184034-71599.png)
=﹣18﹣12﹣0.1,
=﹣30.1;
(13)﹣32×(﹣
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817184034-29228.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817184034-32226.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817184035-89795.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817184035-48864.png)
=﹣9×
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817184035-67761.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817184035-52118.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817184035-15118.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817184036-95351.png)
=﹣1﹣18+4﹣9,
=﹣24.
核心考点
举一反三
(1)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817184001-51757.png)
(2)求
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817184002-61688.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817184002-41131.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817184002-22917.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817184002-31831.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817184002-30797.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817183959-16515.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817183958-98185.png)
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