题目内容
用竖式计算并验算.
1.2×3.45=
91.8÷0.24=
1.2×3.45=
91.8÷0.24=
分析:按照小数乘法和除法的计算法则进行计算,用逆运算进行验算.
解答:解:(1)1.2×3.45=4.14,
![](http://thumb.1010pic.com/pic3/upload/images/201203/47/c729875b.png)
验算:
![](http://thumb.1010pic.com/pic3/upload/images/201203/47/a8de72ce.png)
(2)91.8÷0.24=382.5.
![](http://thumb.1010pic.com/pic3/upload/images/201203/47/2aa85829.png)
验算:
![](http://thumb.1010pic.com/pic3/upload/images/201203/47/8f5af74f.png)
![](http://thumb.1010pic.com/pic3/upload/images/201203/47/c729875b.png)
验算:
![](http://thumb.1010pic.com/pic3/upload/images/201203/47/a8de72ce.png)
(2)91.8÷0.24=382.5.
![](http://thumb.1010pic.com/pic3/upload/images/201203/47/2aa85829.png)
验算:
![](http://thumb.1010pic.com/pic3/upload/images/201203/47/8f5af74f.png)
点评:此题是考查小数乘法和除法的竖式计算,用计算法则进行计算,用逆运算验算.
![](http://thumb2018.1010pic.com/images/loading.gif)
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