一道数学简便题啊~十万火急啊~我给10分~还可能追加分,总之快~

2024-11-16 15:45:49
推荐回答(2个)
回答1:

13又/19+86又15/19*0.25+0.625*86又15/19*0.125=?
= 13又4/19+86又15/19*(1/4+5/8+1/8)
= 13又4/19+86又15/19*1
= 13又4/19+86又15/19
= 100

估计你题目里的 13又19/4 写错了

回答2:

13又19/4+86又15/19*0.25+0.625*86又15/19*0.125
=13又19/4+86又15/19*(0.25+0.625*0.125)
=(13*4+19)/4+(86*19+15)/19*1
=(52+19)/4+(1634+15)/19
=(71*19)/(4*19)+(1649*4)/(19*4)
=(1349+6596)/76
=7945/76
=104又41/76