题目内容
怎样简便就怎样算![]() ![]() ![]() | ![]() ![]() ![]() ![]() | ![]() ![]() ![]() |
3-![]() ![]() ![]() | ![]() ![]() ![]() ![]() | 24×![]() |
[4-(![]() ![]() ![]() | 26×![]() | ![]() ![]() ![]() ![]() |
![]() ![]() ![]() |
(1)
,
=
,
=(
)×
,
=1×
,
=
,
(2)
,
=
,
=
,
=1
,
=1
,
(3)
,
=
×
-
×
,
=10
,
=1
,
(4)3-
×
,
=3-
,
=3-(
),
=3-1,
=2,
(5)
÷【(
+
)×
】,
=
÷【
×
】,
=
÷
,
=3,
(6)
,
=(25-1)×
,
=25×
-1×
,
=4-
,
=
,
(7)【4-(
)】×
,
=【4-
】×
,
=
×
,
=
,
(8)26×
,
=(25+1)×
,
=25×
+1×
,
=4+
,
=4
,
(9)
,
=
,
=
,
=
,
(10)
,
=
,
=
.
分析:按照分数的四则混合运算的顺序,结合运算定律即可解决此类问题.
点评:抓住运算定律的特点,各算式中能简便的要简便.
![](http://thumb.1010pic.com/pic5/latex/311144.png)
=
![](http://thumb.1010pic.com/pic5/latex/517130.png)
=(
![](http://thumb.1010pic.com/pic5/latex/15787.png)
![](http://thumb.1010pic.com/pic5/latex/8.png)
=1×
![](http://thumb.1010pic.com/pic5/latex/8.png)
=
![](http://thumb.1010pic.com/pic5/latex/8.png)
(2)
![](http://thumb.1010pic.com/pic5/latex/517131.png)
=
![](http://thumb.1010pic.com/pic5/latex/517132.png)
=
![](http://thumb.1010pic.com/pic5/latex/517133.png)
=1
![](http://thumb.1010pic.com/pic5/latex/20872.png)
=1
![](http://thumb.1010pic.com/pic5/latex/8.png)
(3)
![](http://thumb.1010pic.com/pic5/latex/517134.png)
=
![](http://thumb.1010pic.com/pic5/latex/602.png)
![](http://thumb.1010pic.com/pic5/latex/4620.png)
![](http://thumb.1010pic.com/pic5/latex/168.png)
![](http://thumb.1010pic.com/pic5/latex/4620.png)
=10
![](http://thumb.1010pic.com/pic5/latex/323964.png)
=1
![](http://thumb.1010pic.com/pic5/latex/168.png)
(4)3-
![](http://thumb.1010pic.com/pic5/latex/33.png)
![](http://thumb.1010pic.com/pic5/latex/517135.png)
=3-
![](http://thumb.1010pic.com/pic5/latex/205368.png)
=3-(
![](http://thumb.1010pic.com/pic5/latex/202413.png)
=3-1,
=2,
(5)
![](http://thumb.1010pic.com/pic5/latex/36.png)
![](http://thumb.1010pic.com/pic5/latex/168.png)
![](http://thumb.1010pic.com/pic5/latex/36.png)
![](http://thumb.1010pic.com/pic5/latex/848.png)
=
![](http://thumb.1010pic.com/pic5/latex/36.png)
![](http://thumb.1010pic.com/pic5/latex/60986.png)
![](http://thumb.1010pic.com/pic5/latex/848.png)
=
![](http://thumb.1010pic.com/pic5/latex/36.png)
![](http://thumb.1010pic.com/pic5/latex/2132.png)
=3,
(6)
![](http://thumb.1010pic.com/pic5/latex/517136.png)
=(25-1)×
![](http://thumb.1010pic.com/pic5/latex/5140.png)
=25×
![](http://thumb.1010pic.com/pic5/latex/5140.png)
![](http://thumb.1010pic.com/pic5/latex/5140.png)
=4-
![](http://thumb.1010pic.com/pic5/latex/5140.png)
=
![](http://thumb.1010pic.com/pic5/latex/517137.png)
(7)【4-(
![](http://thumb.1010pic.com/pic5/latex/205483.png)
![](http://thumb.1010pic.com/pic5/latex/151896.png)
=【4-
![](http://thumb.1010pic.com/pic5/latex/597.png)
![](http://thumb.1010pic.com/pic5/latex/151896.png)
=
![](http://thumb.1010pic.com/pic5/latex/186214.png)
![](http://thumb.1010pic.com/pic5/latex/151896.png)
=
![](http://thumb.1010pic.com/pic5/latex/13.png)
(8)26×
![](http://thumb.1010pic.com/pic5/latex/5140.png)
=(25+1)×
![](http://thumb.1010pic.com/pic5/latex/5140.png)
=25×
![](http://thumb.1010pic.com/pic5/latex/5140.png)
![](http://thumb.1010pic.com/pic5/latex/5140.png)
=4+
![](http://thumb.1010pic.com/pic5/latex/5140.png)
=4
![](http://thumb.1010pic.com/pic5/latex/5140.png)
(9)
![](http://thumb.1010pic.com/pic5/latex/517138.png)
=
![](http://thumb.1010pic.com/pic5/latex/517139.png)
=
![](http://thumb.1010pic.com/pic5/latex/517140.png)
=
![](http://thumb.1010pic.com/pic5/latex/204008.png)
(10)
![](http://thumb.1010pic.com/pic5/latex/517141.png)
=
![](http://thumb.1010pic.com/pic5/latex/218818.png)
=
![](http://thumb.1010pic.com/pic5/latex/13.png)
分析:按照分数的四则混合运算的顺序,结合运算定律即可解决此类问题.
点评:抓住运算定律的特点,各算式中能简便的要简便.
![](http://thumb2018.1010pic.com/images/loading.gif)
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