找规律填数15,16,13,13,11,22,( ),( ),7,( ).
问题描述:
找规律填数15,16,13,13,11,22,( ),( ),7,( ).
答
15,16,13,13,11,22,(9 ),(19 ),7,( 28).
15 13 11 9 7 依次减2
16 13 22 19 28 依次减3 加9