|1/101-1/102|+|1/102-1/103|+|1/103+1/104|+|1/104-1/105|

问题描述:

|1/101-1/102|+|1/102-1/103|+|1/103+1/104|+|1/104-1/105|
绝对值..
黄冈练创考七年级上
第1.2.4第2课时16题

=1/101-1/102+1/102-1/103+1/103-1/104+1/104-1/105
=1/101-1/105
=(105-101)/(101*105)
=4/10605