求解过程:3/117+4/117+5/117.15/117-16/133-17/133.22/133 谢谢!

问题描述:

求解过程:3/117+4/117+5/117.15/117-16/133-17/133.22/133 谢谢!

=(3+4+5+...+15)/117-(16+17+18...+22)/133
=(3+15)*13/2/117-(16+22)*7/2/133
=1-1
=0