小学四年级奥数举一反三参考答案第 1 讲 练习 1:(1)2,6,10,14,( 18 ),22,26 (2)3,6,9,12,(15 ),18,21 (3)33,28,23,( 18 ), 13,(), 3 (4)55,49,43,( 37 ), 31,(), 19 (5)3,6,12,( 24 ),48,(),192 (6)2,6,18,( 54 ), 162,()(7)128,64,32,( 16 ), 8,(), 2 (8)19,3,17,3,15,3,( 13 ),( 3 ),11,3
练习 2:(1)10,11,13,16,20,( 25 ),31 (2)1,4,9,16,25,( 36 ), 49,64 (3)3,2,5,2,7,2,( 9 ),( 2 ), 11,2 (4)53,44,36,29,( 23 ), 18,( 14 ), 11,9,8 (5)81,64,49,36,( 25 ), 16,( 9 ), 4,1,0 (6)28,1,26,1,24,1,( 22 ),( 1 ), 20,1 (7)30,2,26,2,22,2,( 18 ),( 2 ), 14,2 (8)1,6,4,8,7,10,( 10 ),( 12 ), 13,14 练习 3:(1)1,6,5,10,9,14,13,( 18 ),( 17 )(2)13,2,15,4,17,6,( 19 ),( 8 )(3)3,29,4,28,6,26,9,23,( 13 ),( 20 ), 18,14 (4)21,2,19,5,17,8,( 15 ),( 11 )(5)32,20,29,18,26,16,( 23 ),( 14 ), 20,12 (6)2,9,6,10,18,11,54,( 12 ),( 162 ), 13,486 (7)1,5,2,8,4,11,8,14,( 16 ),( 17