30,8,25,7,20,6( ),( )找规律
问题描述:
30,8,25,7,20,6( ),( )找规律
答
15,5 30-5=25,8-1=7 25-5=20,7-1=6 20-5=15,6-1=5
30,8,25,7,20,6( ),( )找规律
15,5 30-5=25,8-1=7 25-5=20,7-1=6 20-5=15,6-1=5