(7/4-5/8+11/12)/(-7/24)
问题描述：
(7/4-5/8+11/12)/(-7/24)
答
(7/4-5/8+11/12)/(-7/24)
=[ (7/4-5/8+11/12)*24]/[(-7/24)*24]
=[49]/[-7]
=-7
答
=（7/4*24-5/8*24+11/12*24)/(-7)
=(42-15+22)/(-7)
=49/(-7)
=-7