题目内容
直接写出得数![]() | ![]() | ![]() | ![]() | 1-75%+25%= |
![]() | ![]() | ![]() | ![]() | ![]() |
解:
×
=
;
=
; 20×
=16; 1÷8×
=
; 1-75%+25%=0.5;
8
=32; ![](http://thumb.1010pic.com/pic5/latex/365.png)
=
;
×
=
;
÷6=
; (![](http://thumb.1010pic.com/pic5/latex/8.png)
)×12=1;
分析:①③⑧约分即可;②④⑥⑨把除法改为乘法,再计算;⑤把百分数化为小数,再计算;⑦通分计算;⑩运用乘法分配律简算.
点评:此题考查了分数的约分、通分、运算定律以及乘除法的转化.
![](http://thumb.1010pic.com/pic5/latex/5193.png)
![](http://thumb.1010pic.com/pic5/latex/5886.png)
![](http://thumb.1010pic.com/pic5/latex/96.png)
![](http://thumb.1010pic.com/pic5/latex/158042.png)
![](http://thumb.1010pic.com/pic5/latex/2919.png)
![](http://thumb.1010pic.com/pic5/latex/602.png)
![](http://thumb.1010pic.com/pic5/latex/112.png)
![](http://thumb.1010pic.com/pic5/latex/480.png)
8
![](http://thumb.1010pic.com/pic5/latex/187008.png)
![](http://thumb.1010pic.com/pic5/latex/365.png)
![](http://thumb.1010pic.com/pic5/latex/323.png)
![](http://thumb.1010pic.com/pic5/latex/927.png)
![](http://thumb.1010pic.com/pic5/latex/2362.png)
![](http://thumb.1010pic.com/pic5/latex/14.png)
![](http://thumb.1010pic.com/pic5/latex/112.png)
![](http://thumb.1010pic.com/pic5/latex/365.png)
![](http://thumb.1010pic.com/pic5/latex/112.png)
![](http://thumb.1010pic.com/pic5/latex/8.png)
![](http://thumb.1010pic.com/pic5/latex/1603.png)
分析:①③⑧约分即可;②④⑥⑨把除法改为乘法,再计算;⑤把百分数化为小数,再计算;⑦通分计算;⑩运用乘法分配律简算.
点评:此题考查了分数的约分、通分、运算定律以及乘除法的转化.
![](http://thumb2018.1010pic.com/images/loading.gif)
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