计算:
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103101408135508401/SYS201311031014081355084009_ST/0.png)
-2sin45°-3
2.
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方式一:(用计算器计算)计算的结果是______.
按键顺序为:
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103101408135508401/SYS201311031014081355084009_ST/images1.png)
方式二:(不用计算器计算)
考点分析:
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化简:(1)
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103101408135508401/SYS201311031014081355084008_ST/0.png)
+sin45°;(2)
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103101408135508401/SYS201311031014081355084008_ST/1.png)
.
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计算:
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103101408135508401/SYS201311031014081355084007_ST/0.png)
×sin30°-|-2|-
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103101408135508401/SYS201311031014081355084007_ST/1.png)
.
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解答下列各题:
(1)计算:
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103101408135508401/SYS201311031014081355084006_ST/0.png)
;
(2)先化简再求值:(x
5+3x
3)÷x
3-(x+1)
2,其中
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103101408135508401/SYS201311031014081355084006_ST/1.png)
;
(3)化简:
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103101408135508401/SYS201311031014081355084006_ST/2.png)
.
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计算:(-4)
2×4
-1+2sin30°.
查看答案
计算:(
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103101408135508401/SYS201311031014081355084004_ST/0.png)
)
-1+16÷(-2)
3+(2005-
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103101408135508401/SYS201311031014081355084004_ST/1.png)
)
-
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103101408135508401/SYS201311031014081355084004_ST/2.png)
tan60°.
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