13:1/2 7/8:14 4/7:5/12的比值(要过程)
问题描述:
13:1/2 7/8:14 4/7:5/12的比值(要过程)
答
13:1/2 7/8:14
=26:1 =7/8:14/1
=112:7
4/7:5/12
=35:48