题目内容
A÷3=B×5,A与B的比是
- A.1:15
- B.15:1
- C.3:5
- D.5:3
B
分析:由“A÷3=B×5“可得:A×
=B×5,假设A为外项,则
为外项,B和5为内项,即A:B=5:
,进行化简即可.
解答:A÷3=B×5,
得:A×
=B×5,
则A:B=5:
=(5×3):(
×3)=15:1;
故选:B.
点评:解答此题应根据比例的基本性质的逆运算进行解答.
分析:由“A÷3=B×5“可得:A×
![](http://thumb.1010pic.com/pic5/latex/8.png)
![](http://thumb.1010pic.com/pic5/latex/8.png)
![](http://thumb.1010pic.com/pic5/latex/8.png)
解答:A÷3=B×5,
得:A×
![](http://thumb.1010pic.com/pic5/latex/8.png)
则A:B=5:
![](http://thumb.1010pic.com/pic5/latex/8.png)
![](http://thumb.1010pic.com/pic5/latex/8.png)
故选:B.
点评:解答此题应根据比例的基本性质的逆运算进行解答.
![](http://thumb2018.1010pic.com/images/loading.gif)
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