题目内容
在横线里填上最简分数. 25秒=________分 | 32厘米=________米 | 75分=________时 |
750克=________千克 | 4000平方米=________公顷. |
![](http://thumb.1010pic.com/pic5/latex/927.png)
![](http://thumb.1010pic.com/pic5/latex/17222.png)
![](http://thumb.1010pic.com/pic5/latex/1180.png)
![](http://thumb.1010pic.com/pic5/latex/365.png)
![](http://thumb.1010pic.com/pic5/latex/335.png)
分析:(1)秒换算成分,要除以它们之间的进率60;
(2)厘米换算成米,要除以它们之间的进率100;
(3)分换算成时,要除以它们之间的进率60;
(4)克换算成千克,要除以它们之间的进率1000;
(5)平方米换算成公顷,要乘它们之间的进率10000.
然后再把计算的结果化成最简分数即可.
解答:根据题意可得:
(1)25÷60=
![](http://thumb.1010pic.com/pic5/latex/162317.png)
![](http://thumb.1010pic.com/pic5/latex/927.png)
所以,25秒=
![](http://thumb.1010pic.com/pic5/latex/927.png)
(2)32÷100=
![](http://thumb.1010pic.com/pic5/latex/205844.png)
![](http://thumb.1010pic.com/pic5/latex/17222.png)
所以,32厘米=
![](http://thumb.1010pic.com/pic5/latex/17222.png)
(3)75÷60=
![](http://thumb.1010pic.com/pic5/latex/396375.png)
![](http://thumb.1010pic.com/pic5/latex/1180.png)
所以,75分=
![](http://thumb.1010pic.com/pic5/latex/1180.png)
(4)750÷1000=
![](http://thumb.1010pic.com/pic5/latex/558300.png)
![](http://thumb.1010pic.com/pic5/latex/365.png)
所以,750克=
![](http://thumb.1010pic.com/pic5/latex/365.png)
(5)4000÷10000=
![](http://thumb.1010pic.com/pic5/latex/558301.png)
![](http://thumb.1010pic.com/pic5/latex/335.png)
所以,4000平方米=
![](http://thumb.1010pic.com/pic5/latex/335.png)
故答案为:
![](http://thumb.1010pic.com/pic5/latex/927.png)
![](http://thumb.1010pic.com/pic5/latex/17222.png)
![](http://thumb.1010pic.com/pic5/latex/1180.png)
![](http://thumb.1010pic.com/pic5/latex/365.png)
![](http://thumb.1010pic.com/pic5/latex/335.png)
点评:单位之间的换算,大单位换算成小单位要乘它们之间的进率;小单位换算成大单位要除以它们之间的进率.
![](http://thumb2018.1010pic.com/images/loading.gif)
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