网址:http://m.1010jiajiao.com/timu3_id_575433[举报]
按照规律,在括号里填上适当的数.
(1)34 30 28(________)(________)18 16 12
(2)20 16 19 15(________)(________)17 13
(3)(________)(________)8 6 11 9 14 12 17