计算|1/2009-1/2008|+|1/2008-1/2007|-|1/2009-1/2007|=( )

来源:学生作业帮助网 编辑:六六作业网 时间:2024/12/18 10:26:41
计算|1/2009-1/2008|+|1/2008-1/2007|-|1/2009-1/2007|=()计算|1/2009-1/2008|+|1/2008-1/2007|-|1/2009-1/2007

计算|1/2009-1/2008|+|1/2008-1/2007|-|1/2009-1/2007|=( )
计算|1/2009-1/2008|+|1/2008-1/2007|-|1/2009-1/2007|=( )

计算|1/2009-1/2008|+|1/2008-1/2007|-|1/2009-1/2007|=( )
根据一个正数的绝对值是它本身,一个负数的绝对值是它的相反数
1/2009-1/2008

原式=1/2008-1/2009+1/2007-1/2008-(1/2007-1/2009)
=1/2008-1/2009+1/2007-1/2008-1/2007+1/2009
=(1/208-1/2008)+(-1/2009+1/2009)+(1/2007-1/2007)
=0+0+0
=0