根据规律填数5,( ),( ),20,15,30,20,40
问题描述:
根据规律填数5,( ),( ),20,15,30,20,40
还有40,24,16,12,( ),( )请注明是根据什么规律填写的
答
5,(10 ),(10 ),20,15,30,20,40
一三五七一组5,10,15,20
二四六八一组10,20,30,40
40,24,16,12,(10 ),(9 )
差16,8,4,2,1