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41.(2008湖南常德市)计算:

解:原式=-2

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40.(2008湖南益阳市)计算:

解:原式=2+1-9+1 ····························· 4分

       =-5 ····························· 6分

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39. (2008浙江温州)计算:

解:

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38.(2008江苏淮安)计算

解:原式=

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37.(2008山东济宁)计算:(,结果精确到0.01)

解:原式

      

      

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36.(2008泰州市)计算:

解:原式=-2+1………………………………………………6分

        =3-(2-)+1……………………………………………7分

        =2+………………………………………………………8分

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35..(2008湘潭市)计算:

解:=······················ 4分

     =0 ································ 6分

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34.(2008永州市)计算:cos45°·(-)-2?-(2)0+|-|+

解:原式

           

            

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33.(2008浙江湖州)计算:

  解:原式=5+1-=5

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32.(2008江苏盐城)计算:

解:原式= 2-+-1  =1.

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