题目内容
列竖式计算
3.2×0.54= | 3.45×0.25= | 1.76×4.2=(得数保留两位小数) | 64.8÷24=验算. |
分析:根据小数乘除法的竖式计算的方法进行计算即可;注意验算方法的选择.
解答:解:
3.2×0.54=1.728
![](http://thumb.1010pic.com/pic3/upload/images/201305/86/600d455d.png)
3.45×0.25=0.8625
![](http://thumb.1010pic.com/pic3/upload/images/201305/86/ab8883c0.png)
1.76×4.2≈7.39
![](http://thumb.1010pic.com/pic3/upload/images/201305/86/6766a624.png)
64.8÷24=2.7
![](http://thumb.1010pic.com/pic3/upload/images/201305/86/3384f0d7.png)
验算:
![](http://thumb.1010pic.com/pic3/upload/images/201305/86/0974af85.png)
3.2×0.54=1.728
![](http://thumb.1010pic.com/pic3/upload/images/201305/86/600d455d.png)
3.45×0.25=0.8625
![](http://thumb.1010pic.com/pic3/upload/images/201305/86/ab8883c0.png)
1.76×4.2≈7.39
![](http://thumb.1010pic.com/pic3/upload/images/201305/86/6766a624.png)
64.8÷24=2.7
![](http://thumb.1010pic.com/pic3/upload/images/201305/86/3384f0d7.png)
验算:
![](http://thumb.1010pic.com/pic3/upload/images/201305/86/0974af85.png)
点评:本题主要考查小数乘除法的笔算,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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