题目内容
竖式计算并验算.
389+756= | 1009-378= |
分析:根据整数加减法的竖式计算的方法进行计算即可;加法的验算一般用减法;减法的验算一般用加法.
解答:解:389+756=1145
![](http://thumb.1010pic.com/pic3/upload/images/201212/78/3366e110.png)
验算:
![](http://thumb.1010pic.com/pic3/upload/images/201212/78/2bab4675.png)
1009-378=631
![](http://thumb.1010pic.com/pic3/upload/images/201212/78/0bf261c0.png)
验算:
![](http://thumb.1010pic.com/pic3/upload/images/201212/78/305d8ba0.png)
![](http://thumb.1010pic.com/pic3/upload/images/201212/78/3366e110.png)
验算:
![](http://thumb.1010pic.com/pic3/upload/images/201212/78/2bab4675.png)
1009-378=631
![](http://thumb.1010pic.com/pic3/upload/images/201212/78/0bf261c0.png)
验算:
![](http://thumb.1010pic.com/pic3/upload/images/201212/78/305d8ba0.png)
点评:本题主要考查整数加减法的笔算,根据各自的计算方法进行计算即可;注意验算方法的选择.
![](http://thumb2018.1010pic.com/images/loading.gif)
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