题目内容
列竖式计算.
5.24×0.65
(用乘法验算)
3.69÷1.7
(保留两位小数)
1.62÷0.45.
5.24×0.65
(用乘法验算)
3.69÷1.7
(保留两位小数)
1.62÷0.45.
分析:根据小数乘除法竖式计算的方法进行计算;用四舍五入法保留小数位数;注意验算方法的选择.
解答:解:
5.24×0.65=3.406
![](http://thumb.1010pic.com/pic3/upload/images/201307/114/c098813f.png)
验算:
![](http://thumb.1010pic.com/pic3/upload/images/201307/114/72d8e6b6.png)
3.69÷1.7≈2.17
![](http://thumb.1010pic.com/pic3/upload/images/201307/114/0928ca09.png)
1.62÷0.45=3.6
![](http://thumb.1010pic.com/pic3/upload/images/201307/114/dd108e94.png)
5.24×0.65=3.406
![](http://thumb.1010pic.com/pic3/upload/images/201307/114/c098813f.png)
验算:
![](http://thumb.1010pic.com/pic3/upload/images/201307/114/72d8e6b6.png)
3.69÷1.7≈2.17
![](http://thumb.1010pic.com/pic3/upload/images/201307/114/0928ca09.png)
1.62÷0.45=3.6
![](http://thumb.1010pic.com/pic3/upload/images/201307/114/dd108e94.png)
点评:考查了小数乘除法的笔算,根据各自的计算方法进行计算;用四舍五入法保留小数位数;注意验算方法的选择.
![](http://thumb2018.1010pic.com/images/loading.gif)
练习册系列答案
相关题目