题目
题型:解答题难度:一般来源:海南省期中题
(1)
![](http://img.shitiku.com.cn/uploads/allimg/20190815/20190815231600-75077.png)
(2)(
![](http://img.shitiku.com.cn/uploads/allimg/20190815/20190815231600-86032.png)
(3)
![](http://img.shitiku.com.cn/uploads/allimg/20190815/20190815231600-29573.png)
(4)
![](http://img.shitiku.com.cn/uploads/allimg/20190815/20190815231600-16382.png)
答案
(1)
![](http://img.shitiku.com.cn/uploads/allimg/20190815/20190815231600-81351.png)
=9﹣6﹣
![](http://img.shitiku.com.cn/uploads/allimg/20190815/20190815231601-61285.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190815/20190815231601-65315.png)
=9﹣6﹣5
=﹣2;
(2)(
![](http://img.shitiku.com.cn/uploads/allimg/20190815/20190815231601-89005.png)
=﹣(
![](http://img.shitiku.com.cn/uploads/allimg/20190815/20190815231601-94772.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190815/20190815231602-96339.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190815/20190815231602-49272.png)
=﹣(12﹣27+6)
=9;(3)
![](http://img.shitiku.com.cn/uploads/allimg/20190815/20190815231602-11368.png)
=﹣
![](http://img.shitiku.com.cn/uploads/allimg/20190815/20190815231602-99134.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190815/20190815231602-63339.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190815/20190815231603-68077.png)
=﹣
![](http://img.shitiku.com.cn/uploads/allimg/20190815/20190815231603-91634.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190815/20190815231603-49924.png)
=﹣
![](http://img.shitiku.com.cn/uploads/allimg/20190815/20190815231603-73544.png)
(4)
![](http://img.shitiku.com.cn/uploads/allimg/20190815/20190815231604-36310.png)
=﹣9×
![](http://img.shitiku.com.cn/uploads/allimg/20190815/20190815231604-95455.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190815/20190815231604-43920.png)
=﹣6+7
=1.
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20190815/20190815231555-67075.png)
(1)这20袋样品中,符合每袋标准质量450克的有 _________ 袋;
(2)这批样品的总质量是多少克?平均质量比标准质量多还是少?多或少几克?(要求写出算式).
(2)﹣32﹣[(﹣2)2+(1﹣
![](http://img.shitiku.com.cn/uploads/allimg/20190815/20190815231550-33402.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190815/20190815231544-15213.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190815/20190815231544-22284.png)
(2)
![](http://img.shitiku.com.cn/uploads/allimg/20190815/20190815231545-75725.png)
(3)﹣32﹣[﹣5﹣0.2÷
![](http://img.shitiku.com.cn/uploads/allimg/20190815/20190815231545-96024.png)
(4)24×(
![](http://img.shitiku.com.cn/uploads/allimg/20190815/20190815231545-50284.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190815/20190815231545-72223.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190815/20190815231545-13511.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190815/20190815231546-17965.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190815/20190815231546-82094.png)
(5)
![](http://img.shitiku.com.cn/uploads/allimg/20190815/20190815231546-89283.png)
(6)
![](http://img.shitiku.com.cn/uploads/allimg/20190815/20190815231546-91671.png)
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