列竖式计算.
3.67+20.438=验算:
100.7-9.603=
0.325×3.6=验算:
14.39÷2.4≈(得数保留两位小数)
解:3.67+20.438=24.108;
3.67
+20.438
![](http://thumb.1010pic.com/pic5/latex/352563.png)
验算:
24.108
-3.67
![](http://thumb.1010pic.com/pic5/latex/352564.png)
100.7-9.603=91.097;
100.7
-9.603
![](http://thumb.1010pic.com/pic5/latex/352565.png)
0.325×3.6=1.17;
![](http://thumb.1010pic.com/pic5/upload/201305/51d6213ae560f.png)
14.39÷2.4≈6.00;
![](http://thumb.1010pic.com/pic5/upload/201305/51d6213b14fb0.png)
分析:根据小数四则运算的计算法则,直接列竖式计算.
点评:此题主要考查小数四则运算的笔算,根据加、减法之间的关系对加法进行验算,根据乘、除法之间的关系对乘法进行验算,以及商的近似值的求法.