题目内容
用竖式计算.
4.5×0.36
91.2÷57
9.15÷1.5验算:
2.55÷1.02
7.23÷6.5(商精确到百分位)
83÷4.5(商用循环小数表示)
4.5×0.36
91.2÷57
9.15÷1.5验算:
2.55÷1.02
7.23÷6.5(商精确到百分位)
83÷4.5(商用循环小数表示)
分析:第一题根据小数乘法竖式计算的方法求解;其它题目根据小数除法竖式计算的方法求解,注意根据要求表示商.
解答:解:4.5×0.36=1.62
![](http://thumb.1010pic.com/pic3/upload/images/201402/16/e1a696e5.png)
91.2÷57=1.6
![](http://thumb.1010pic.com/pic3/upload/images/201402/16/5378b06c.png)
9.15÷1.5=6.1
![](http://thumb.1010pic.com/pic3/upload/images/201402/16/2c7475a0.png)
验算:
![](http://thumb.1010pic.com/pic3/upload/images/201402/16/a38ad033.png)
2.55÷1.02=2.5
![](http://thumb.1010pic.com/pic3/upload/images/201402/16/cbe22ae6.png)
7.23÷6.5≈1.11
![](http://thumb.1010pic.com/pic3/upload/images/201402/16/d816c79b.png)
83÷4.5=18.
![](http://thumb.1010pic.com/pic3/upload/images/201402/16/26391f2f.png)
![](http://thumb.1010pic.com/pic3/upload/images/201402/16/e1a696e5.png)
91.2÷57=1.6
![](http://thumb.1010pic.com/pic3/upload/images/201402/16/5378b06c.png)
9.15÷1.5=6.1
![](http://thumb.1010pic.com/pic3/upload/images/201402/16/2c7475a0.png)
验算:
![](http://thumb.1010pic.com/pic3/upload/images/201402/16/a38ad033.png)
2.55÷1.02=2.5
![](http://thumb.1010pic.com/pic3/upload/images/201402/16/cbe22ae6.png)
7.23÷6.5≈1.11
![](http://thumb.1010pic.com/pic3/upload/images/201402/16/d816c79b.png)
83÷4.5=18.
? |
4 |
![](http://thumb.1010pic.com/pic3/upload/images/201402/16/26391f2f.png)
点评:本题考查了小数乘除法竖式计算的方法,计算时要细心,注意把数位对齐.
![](http://thumb2018.1010pic.com/images/loading.gif)
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