用竖式计算下列各题,并验算后两题.
355×4=
507×8=
306×9=
38÷8=
55÷7=
73÷9=
864-328=
600-384=
验算:
382+859=
验算:
解:355×4=1420,
![](http://thumb.1010pic.com/pic5/upload/201305/51d62170ea520.png)
507×8=4056,
![](http://thumb.1010pic.com/pic5/upload/201305/51d6217117192.png)
306×9=2754,
![](http://thumb.1010pic.com/pic5/upload/201305/51d6217139b91.png)
38÷8=4…6,
![](http://thumb.1010pic.com/pic5/upload/201305/51d621715b1ee.png)
55÷7=7…6,
![](http://thumb.1010pic.com/pic5/upload/201305/51d621717d413.png)
73÷9=8…1,
![](http://thumb.1010pic.com/pic5/upload/201305/51d621719e070.png)
864-328=536,
![](http://thumb.1010pic.com/pic5/upload/201305/51d62171bfaed.png)
600-384=216,
![](http://thumb.1010pic.com/pic5/upload/201305/51d62171e0f51.png)
验算:
![](http://thumb.1010pic.com/pic5/upload/201305/51d621720d561.png)
382+859=1241,
![](http://thumb.1010pic.com/pic5/upload/201305/51d621722eb06.png)
验算:
![](http://thumb.1010pic.com/pic5/upload/201305/51d6217250c24.png)
.
分析:根据整数加减乘除竖式计算的方法进行计算,注意验算的方法,加法的验算用减法,而减法的验算用加法.
点评:列竖式计算时,按照计算法则进行计算,数位要对齐的一定要对齐,注意验算方法的选择.