找规律,在口里填数 (1)1,1,2,3,5,8,13,口,34,55.(2)3,8,18,33,53,78,口
问题描述:
找规律,在口里填数 (1)1,1,2,3,5,8,13,口,34,55.(2)3,8,18,33,53,78,口
答
(1)1,1,2,3,5,8,13,21,34,55---------后一项是前两项的和
(2)3,8,18,33,53,78,108-------后一项比前一项大其前一项位数的5倍