16\3+24\143+4\77-22\117简便运算
问题描述:
16\3+24\143+4\77-22\117简便运算
答
16\63+24\143+4\77-22\117
=1/7+1/9+1/11+1/13+1/7-1/11-1/9-1/13
=1/7+1/7
=2/7