题目内容

计算(1)-23+(+58)-(-5)    
(2)×(-36)
(3)-22×(-)+8÷(-2)   
(4)(-1)2009-(1-0.5)××[2-(-3)2]

解:(1)
                =
                =40
(2)
法(一)
              =      
              =
              =
法(二)      
              =      
              =      
              =
(3)
        =
        =
        =4
(4)
        =
        =
        =
        =

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