13又4/19+86又15/19*0.25+0.625*86又15/19+0.125*86又15/19
问题描述：
13又4/19+86又15/19*0.25+0.625*86又15/19+0.125*86又15/19
我看过你接的题,相信这道题你也解的出来
答
13又4/19+86又15/19*0.25+0.625*86又15/19+0.125*86又15/19
=13又4/19+86又15/19*(0.25+0.625+0.125)
=13又4/19+86又15/19*1
=13又4/19+86又15/19
=100