题目内容
列竖式计算 0.18×2.45= |
6.7×0.23= |
36×0.25= | 1.05×6.7=验算 |
0.86×4.3(得数保留两位小数) | 2.69×8.6(得数保留一位小数) |
分析:小数乘法的法则:按整数乘法的法则算出积; 再看因数中一共有几位小数,就从得数的右边起数出几位,点上小数点;得数的小数部分末尾有0,一般要把0去掉;据此计算.
解答:解:(1)
![](http://thumb.1010pic.com/pic3/upload/images/201208/11/9d40eaa9.png)
(2)
![](http://thumb.1010pic.com/pic3/upload/images/201208/11/d46b84b3.png)
(3)
![](http://thumb.1010pic.com/pic3/upload/images/201208/11/142e3ba5.png)
(4)
![](http://thumb.1010pic.com/pic3/upload/images/201208/11/e3dd5750.png)
验算:7.035÷6.7=1.05,
7.035÷1.05=6.7.
(5)
![](http://thumb.1010pic.com/pic3/upload/images/201208/11/3adb741a.png)
(6)
![](http://thumb.1010pic.com/pic3/upload/images/201208/11/83d71e17.png)
![](http://thumb.1010pic.com/pic3/upload/images/201208/11/9d40eaa9.png)
(2)
![](http://thumb.1010pic.com/pic3/upload/images/201208/11/d46b84b3.png)
(3)
![](http://thumb.1010pic.com/pic3/upload/images/201208/11/142e3ba5.png)
(4)
![](http://thumb.1010pic.com/pic3/upload/images/201208/11/e3dd5750.png)
验算:7.035÷6.7=1.05,
7.035÷1.05=6.7.
(5)
![](http://thumb.1010pic.com/pic3/upload/images/201208/11/3adb741a.png)
(6)
![](http://thumb.1010pic.com/pic3/upload/images/201208/11/83d71e17.png)
点评:解答此题的依据是小数乘法的法则,掌握法则是解答的关键.
![](http://thumb2018.1010pic.com/images/loading.gif)
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