计算:(1)
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101224733606294654/SYS201311012247336062946017_ST/0.png)
+
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101224733606294654/SYS201311012247336062946017_ST/1.png)
+lg20-lg2-(log
32)•(log
23)
(2)
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101224733606294654/SYS201311012247336062946017_ST/2.png)
-
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101224733606294654/SYS201311012247336062946017_ST/3.png)
-lg
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101224733606294654/SYS201311012247336062946017_ST/4.png)
-sin30°+(
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101224733606294654/SYS201311012247336062946017_ST/5.png)
-1)
lg1.
考点分析:
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