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,( ).

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