(2006•攀枝花)请将下面的代数式尽可能化简,再选择一个你喜欢的数(要合适哦!)代入求值:
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131019110301275022301/SYS201310191103012750223019_ST/0.png)
a+(1-a)+
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131019110301275022301/SYS201310191103012750223019_ST/1.png)
.
考点分析:
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![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131019110301275022301/SYS201310191103012750223014_ST/0.png)
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