题目内容
简便方法写出下面的循环小数:
6.777…记作:(________)
7.04646…记作:(________ )
5.34545…记作:(________ )
0.19898…记作:(________ )
0.14861486…记作:(________ )
6.
7.0![](http://thumb.1010pic.com/pic5/latex/213824.png)
5.3![](http://thumb.1010pic.com/pic5/latex/213824.png)
0.1![](http://thumb.1010pic.com/pic5/latex/213972.png)
0.
48![](http://thumb.1010pic.com/pic5/latex/207068.png)
分析:循环小数的简便记法:写出第一个循环节,在首位和末位点上循环点即可.
解答:6.777…记作:(6.
)
7.04646…记作:(7.0![](http://thumb.1010pic.com/pic5/latex/28790.png)
)
5.34545…记作:(5.3![](http://thumb.1010pic.com/pic5/latex/28790.png)
)
0.19898…记作:(0.1![](http://thumb.1010pic.com/pic5/latex/151929.png)
)
0.14861486…记作:(0.
48
);
故答案为:6.
,7.0![](http://thumb.1010pic.com/pic5/latex/28790.png)
,5.3![](http://thumb.1010pic.com/pic5/latex/28790.png)
,0.1![](http://thumb.1010pic.com/pic5/latex/151929.png)
,0.
48
.
点评:此题考查如何用简便形式表示循环小数:找出循环的数字,在首位和末位上面点上圆点即可.
![](http://thumb.1010pic.com/pic5/latex/213977.png)
![](http://thumb.1010pic.com/pic5/latex/213824.png)
![](http://thumb.1010pic.com/pic5/latex/207068.png)
![](http://thumb.1010pic.com/pic5/latex/213824.png)
![](http://thumb.1010pic.com/pic5/latex/213778.png)
![](http://thumb.1010pic.com/pic5/latex/213972.png)
![](http://thumb.1010pic.com/pic5/latex/213779.png)
![](http://thumb.1010pic.com/pic5/latex/213877.png)
![](http://thumb.1010pic.com/pic5/latex/207068.png)
分析:循环小数的简便记法:写出第一个循环节,在首位和末位点上循环点即可.
解答:6.777…记作:(6.
![](http://thumb.1010pic.com/pic5/latex/28791.png)
7.04646…记作:(7.0
![](http://thumb.1010pic.com/pic5/latex/28790.png)
![](http://thumb.1010pic.com/pic5/latex/28792.png)
5.34545…记作:(5.3
![](http://thumb.1010pic.com/pic5/latex/28790.png)
![](http://thumb.1010pic.com/pic5/latex/135394.png)
0.19898…记作:(0.1
![](http://thumb.1010pic.com/pic5/latex/151929.png)
![](http://thumb.1010pic.com/pic5/latex/151912.png)
0.14861486…记作:(0.
![](http://thumb.1010pic.com/pic5/latex/71571.png)
![](http://thumb.1010pic.com/pic5/latex/28792.png)
故答案为:6.
![](http://thumb.1010pic.com/pic5/latex/28791.png)
![](http://thumb.1010pic.com/pic5/latex/28790.png)
![](http://thumb.1010pic.com/pic5/latex/28792.png)
![](http://thumb.1010pic.com/pic5/latex/28790.png)
![](http://thumb.1010pic.com/pic5/latex/135394.png)
![](http://thumb.1010pic.com/pic5/latex/151929.png)
![](http://thumb.1010pic.com/pic5/latex/151912.png)
![](http://thumb.1010pic.com/pic5/latex/71571.png)
![](http://thumb.1010pic.com/pic5/latex/28792.png)
点评:此题考查如何用简便形式表示循环小数:找出循环的数字,在首位和末位上面点上圆点即可.
![](http://thumb2018.1010pic.com/images/loading.gif)
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