13 9/4+86 19/15×0.25+0.625×86 19/15+86 19/15×0.125悬赏慢慢提高

13 9/4+86 19/15×0.25+0.625×86 19/15+86 19/15×0.125悬赏慢慢提高
13 9/4+86 19/15×0.25+0.625×86 19/15+86 19/15×0.125
悬赏慢慢提高

13 9/4+86 19/15×0.25+0.625×86 19/15+86 19/15×0.125悬赏慢慢提高
你核对一下题目有没有抄错,数字不对,应该是这样的
13又4/19+86又15/19×0.25+0.625×86又15/19+86又15/19×0.125
=13又4/19+86又15/19[0.25+0.625+0.125]
=13又4/19+86又15/19×1
=[13+86]+[4/19+15/19]
=99+1
=100

13又4/19 86又15/19×0.25 0.625×86又15/19 86又15/19×0.125 =13又4/19 86又15/19[0.25 0.625 0.125] =13又4/19 86又15/19×1