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 ) ( 8) 320, 1, 160, 3, 80, 9, 40, 27, ( 20 ) , ( 81 ) 练习 4:( 1) 2, 2, 4, 6, 10, 16, ( 26 ) , ( 42 ) ( 2) 34, 21, 13, 8, 5, ( 3 ) , 2, ( ...