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1、精选优质文档-倾情为你奉上找规律填数练习题1仔细观察每一排数的排列有什么规律,然后按规律在( )内填上适当的数(1)2,4,8,16,( ),64(2)1,4,9,16,( ),36,4964(3)1,4,7,10,13,( ),19,21(4)1,4,16,64,( ),1024,4096(5)2,3,5,9,17,( ),65,129(6)15,4,13,4,11, 4,( ),( )(7)8,15,10,13,12,11,( ),( )2空格里应填什么数? 3找规律填数4在中填数:已知99999=1111,想一想:在中填上什么数字,才能使下面的等式成立?(1)9999=2222;(2)9
2、999=3333;(3)9999=4444;(4)9999=7777;(5)9999=9999例1. 找规律填数。(1)27,6,23,6,19,6,15,6,( ),( )(2)2,3,5,8,12,( ),( )(3)18,4,15,8,12,12,9,16,( ),( )针对练习:找规律填数。(1)21,5,18,5,15,5,( ),( )(2)1,2,4,2,7,2,10,( ),( )(3)37,4,29,4,21,4,( ),( )(4)1,3,7,13,21,( ),( )(5)51,42,34,27,( ),( )(6)63,48,35,24,( ),( )例2仔细观察,找出
3、规律,并根据规律在括号里填上合适的数。(1)1,2,4,8,16,( ),( )(2)128,64,32,16,( ),( )针对练习:找出规律,并根据规律在括号里填上合适的数。(1)2,4,8,16,( )(2)81,27,9,3,( )(3)2,8,32,128,( )(4)64,32,16,8,( )(5)3125,625,125,25,( )例3找出各组数间的规律,在横线上填上合适的数。1(5,20),(6,19),(8,17),(10, )2(25,15),(37,27),(83,73),( ,25)3(1,60),(2,30),(3,20),(4, )针对练习:找规律填数。1(13
4、,27),(25,15),(20, )2(7,43),(37,13),( ,26)3(34,16),(78,60),(54, )4(1,72),(2,36),(3,24),(4, )课后作业:根据规律,把所缺的数填写出来。(1)321,79,421,82,521,85,( ),( )(2)8255,1124,8155,1224,8055,1324,( ),( )(3)4,5,9,14,23,( ),( )(4)3,5,7,15,27,49,( ),( )(5)2,5,14,41,( ),( )(6)(59,41),(37,63),(81,19),(29, )(7)(10,15),(11,16),(98,103),( ,298)(8)(1,88),(8,11),(4,22),(2, )专心-专注-专业