(5/6-3/9)*(0.25+5/7)
问题描述:
(5/6-3/9)*(0.25+5/7)
答
27/56
答
(5/6-3/9)*(0.25+5/7)
(15/18-6/18)*(7/28+20/28)
=1/2*27/28
=27/56