题目内容
(1)计算;|-1|-![](http://thumb.1010pic.com/pic1/imagenew2/czsx/10/18270.png)
![](http://thumb.1010pic.com/pic1/imagenew2/czsx/11/18271.png)
(2)依据下列解方程
![](http://thumb.1010pic.com/pic1/imagenew2/czsx/12/18272.png)
解:原方程可变形为
![](http://thumb.1010pic.com/pic1/imagenew2/czsx/13/18273.png)
去分母,得3(3
![](http://thumb.1010pic.com/pic1/imagenew2/czsx/14/18274.png)
![](http://thumb.1010pic.com/pic1/imagenew2/czsx/14/18274.png)
去括号,得9
![](http://thumb.1010pic.com/pic1/imagenew2/czsx/14/18274.png)
![](http://thumb.1010pic.com/pic1/imagenew2/czsx/14/18274.png)
( ),得9
![](http://thumb.1010pic.com/pic1/imagenew2/czsx/14/18274.png)
![](http://thumb.1010pic.com/pic1/imagenew2/czsx/14/18274.png)
合并,得5
![](http://thumb.1010pic.com/pic1/imagenew2/czsx/14/18274.png)
( ),得
![](http://thumb.1010pic.com/pic1/imagenew2/czsx/14/18274.png)
![](http://thumb.1010pic.com/pic1/imagenew2/czsx/2/18282.png)
(1)
(2)见解析解析:
(1)解:原式=1-
×2
-1+2
=![](http://thumb.1010pic.com/pic1/imagenew2/czsx/3/18283.png)
(2)解:分数的基本性质 …1分,
移项…2分,
等式性质1…3分,
系数化为1…4分
![](http://thumb.1010pic.com/pic1/imagenew2/czsx/3/18283.png)
(1)解:原式=1-
![](http://thumb.1010pic.com/pic1/imagenew2/czsx/4/18284.png)
![](http://thumb.1010pic.com/pic1/imagenew2/czsx/3/18283.png)
![](http://thumb.1010pic.com/pic1/imagenew2/czsx/3/18283.png)
![](http://thumb.1010pic.com/pic1/imagenew2/czsx/3/18283.png)
(2)解:分数的基本性质 …1分,
移项…2分,
等式性质1…3分,
系数化为1…4分
![](http://thumb2018.1010pic.com/images/loading.gif)
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