题目内容
用竖式计算并标☆的要验算. ☆139+682= | ☆701-573= |
600-139= | 725+698= |
解:139+682=821;
![](http://thumb.1010pic.com/pic5/upload/201305/51d6389bd5192.png)
验算:
![](http://thumb.1010pic.com/pic5/upload/201305/51d6389c0164e.png)
701-573=128;
![](http://thumb.1010pic.com/pic5/upload/201305/51d6389c228a1.png)
验算:
![](http://thumb.1010pic.com/pic5/upload/201305/51d6389c42eed.png)
600-139=461;
![](http://thumb.1010pic.com/pic5/upload/201305/51d6389c6467b.png)
725+698=1423.
![](http://thumb.1010pic.com/pic5/upload/201305/51d6389c83e1d.png)
分析:根据整数加减法的竖式计算方法进行计算即可;加法的验算一般用减法,而减法的验算一般用加法.
点评:本题主要考查整数加减法的笔算和验算,然后再进一步计算即可.
![](http://thumb.1010pic.com/pic5/upload/201305/51d6389bd5192.png)
验算:
![](http://thumb.1010pic.com/pic5/upload/201305/51d6389c0164e.png)
701-573=128;
![](http://thumb.1010pic.com/pic5/upload/201305/51d6389c228a1.png)
验算:
![](http://thumb.1010pic.com/pic5/upload/201305/51d6389c42eed.png)
600-139=461;
![](http://thumb.1010pic.com/pic5/upload/201305/51d6389c6467b.png)
725+698=1423.
![](http://thumb.1010pic.com/pic5/upload/201305/51d6389c83e1d.png)
分析:根据整数加减法的竖式计算方法进行计算即可;加法的验算一般用减法,而减法的验算一般用加法.
点评:本题主要考查整数加减法的笔算和验算,然后再进一步计算即可.
![](http://thumb2018.1010pic.com/images/loading.gif)
练习册系列答案
相关题目