(5,6,10,).(5,12,20)(6,20,40)(9,8,?)
问题描述:
(5,6,10,).(5,12,20)(6,20,40)(9,8,?)
答
5×6÷3=10
5×12÷3=20
6×20÷3=40
9×8÷3=24(即?)
所以?填24