1-(1/2-1/3)-(1/3-1/4).-(1/2007-1/2008)=?_数学解答

1-(1/2-1/3)-(1/3-1/4).-(1/2007-1/2008)=?

人气：140 ℃　时间：2020-01-29 05:04:54

解答

　　1-(1/2-1/3)-(1/3-1/4).-(1/2007-1/2008)=1-1/2+1/3-1/3+1/4.-1/2007+1/2008=1-1/2+1/2008=1005/2008
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