题目内容
列竖式计算.(带※号题要用乘法验算)
14.16×0.25 | ※42.5÷16 | 2.4÷0.25 | ※15.4-9.98. |
分析:根据小数减法、乘法、除法的计算法则,直接列竖式计算;根据商乘除数等于被除数,对除法进行验算;根据差+减数=被减数,对减法进行验算.
解答:解:①14.16×0.25=3.54;
![](http://thumb.1010pic.com/pic3/upload/images/201309/39/8fee5f1c.png)
②42.5÷16=2.65625;
![](http://thumb.1010pic.com/pic3/upload/images/201309/39/d7c1c562.png)
验算:
![](http://thumb.1010pic.com/pic3/upload/images/201309/39/3ed2c559.png)
③2.4÷0.25=9.6;
![](http://thumb.1010pic.com/pic3/upload/images/201309/39/b419c83f.png)
④15.4-9.98=5.42;
![](http://thumb.1010pic.com/pic3/upload/images/201309/39/3ac0775f.png)
验算:
![](http://thumb.1010pic.com/pic3/upload/images/201309/39/509d4d12.png)
![](http://thumb.1010pic.com/pic3/upload/images/201309/39/8fee5f1c.png)
②42.5÷16=2.65625;
![](http://thumb.1010pic.com/pic3/upload/images/201309/39/d7c1c562.png)
验算:
![](http://thumb.1010pic.com/pic3/upload/images/201309/39/3ed2c559.png)
③2.4÷0.25=9.6;
![](http://thumb.1010pic.com/pic3/upload/images/201309/39/b419c83f.png)
④15.4-9.98=5.42;
![](http://thumb.1010pic.com/pic3/upload/images/201309/39/3ac0775f.png)
验算:
![](http://thumb.1010pic.com/pic3/upload/images/201309/39/509d4d12.png)
点评:此题考查的目的是理解掌握小数加法、减法、乘法、除法的计算法则,并且能够正确熟练地进行计算.
![](http://thumb2018.1010pic.com/images/loading.gif)
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