题目内容
+
+
+
+
.
解:
+
+
+
+
,
=(1-
)+(![](http://thumb.1010pic.com/pic5/latex/13.png)
)+(
-
)+(
-
)+(
-
),
=1-
+![](http://thumb.1010pic.com/pic5/latex/13.png)
+
-
+
-
+
-
,
=1-
,
=
.
分析:把算式中的
改写成(1-
)、
改写成(![](http://thumb.1010pic.com/pic5/latex/13.png)
)、
改写成(
-
)、
改写成(
-
)、
改写成(
-
),进而去括号得解.
点评:解决此题关键是根据数据的特点,把每一个数据进行适当的改写,进而找出简便方法.
![](http://thumb.1010pic.com/pic5/latex/13.png)
![](http://thumb.1010pic.com/pic5/latex/96.png)
![](http://thumb.1010pic.com/pic5/latex/112.png)
![](http://thumb.1010pic.com/pic5/latex/69.png)
![](http://thumb.1010pic.com/pic5/latex/5750.png)
=(1-
![](http://thumb.1010pic.com/pic5/latex/13.png)
![](http://thumb.1010pic.com/pic5/latex/13.png)
![](http://thumb.1010pic.com/pic5/latex/1603.png)
![](http://thumb.1010pic.com/pic5/latex/96.png)
![](http://thumb.1010pic.com/pic5/latex/112.png)
![](http://thumb.1010pic.com/pic5/latex/112.png)
![](http://thumb.1010pic.com/pic5/latex/69.png)
![](http://thumb.1010pic.com/pic5/latex/69.png)
![](http://thumb.1010pic.com/pic5/latex/5750.png)
=1-
![](http://thumb.1010pic.com/pic5/latex/13.png)
![](http://thumb.1010pic.com/pic5/latex/13.png)
![](http://thumb.1010pic.com/pic5/latex/1603.png)
![](http://thumb.1010pic.com/pic5/latex/96.png)
![](http://thumb.1010pic.com/pic5/latex/112.png)
![](http://thumb.1010pic.com/pic5/latex/112.png)
![](http://thumb.1010pic.com/pic5/latex/69.png)
![](http://thumb.1010pic.com/pic5/latex/69.png)
![](http://thumb.1010pic.com/pic5/latex/5750.png)
=1-
![](http://thumb.1010pic.com/pic5/latex/5750.png)
=
![](http://thumb.1010pic.com/pic5/latex/10220.png)
分析:把算式中的
![](http://thumb.1010pic.com/pic5/latex/13.png)
![](http://thumb.1010pic.com/pic5/latex/13.png)
![](http://thumb.1010pic.com/pic5/latex/96.png)
![](http://thumb.1010pic.com/pic5/latex/13.png)
![](http://thumb.1010pic.com/pic5/latex/1603.png)
![](http://thumb.1010pic.com/pic5/latex/112.png)
![](http://thumb.1010pic.com/pic5/latex/96.png)
![](http://thumb.1010pic.com/pic5/latex/112.png)
![](http://thumb.1010pic.com/pic5/latex/69.png)
![](http://thumb.1010pic.com/pic5/latex/112.png)
![](http://thumb.1010pic.com/pic5/latex/69.png)
![](http://thumb.1010pic.com/pic5/latex/5750.png)
![](http://thumb.1010pic.com/pic5/latex/69.png)
![](http://thumb.1010pic.com/pic5/latex/5750.png)
点评:解决此题关键是根据数据的特点,把每一个数据进行适当的改写,进而找出简便方法.
![](http://thumb2018.1010pic.com/images/loading.gif)
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