| 41.81,77,68,52,( ) A.27 B.35 C.43 D.47 42.65,35,17,( ),1 A.9 B.8 C.0 D.3 43.4/9,11/3,( ),12,36 A.2 B.3 C.4 D.5 44.1/4,3/10,7/20,2/5,( ) A.3/5 B.4/5 C.1 D.9/20 45.10,10,8,4,( ) A.4 B.2 C.-2 D.-4 46.1.01,1.02,2.03,3.05,5.08,( ),13.21 A.8.1l B.8.12 C.8.13 D.8.14 47.128,243,64,( ),1/6 A.5 B.16 C.67 D.10 48.1,2,5,26,( ) A.31 B.51 C.81 D.677 49.0.003,0.06,0.9f12,( ) A.15 B.30 C.150 D.300 50.7,8,1l,20,47,( ) A.69 B.128 C.108 D.87 51.6,l/2,12,l/24,( ) A.36 B.72 C.164 D.288 52.(4,13),(7,22),(10,31),(13,40),( ) A-(15,51) B.(16,49) C.(16,51) D.(15,49) 53.1,1,3,1/9,5,l/25,7,( ),( ),1/81 A.1/37,1l B.1/43,8 C.1/49,9 D.1/49,11 54.10,12,18,36,90,( ) A.252 B.250 C.144 D.142 55.2,5,9,19,37,( ) A.59 B.74 C.73 D.75 56.0,3/2,2/3,5/4,4/5,( ) A.7/6 B.6/7 C.8/9 D.7/8 57.20,22,25,30,37,( ) A.39 B.45 C.48 D.51 58.-2,1,7,16,( ),43 A.-25 B.28 C.3l D.35 59.4,5,7,ll,19,( ) A.27 B.31 C.35 D.41 60.13,( ),22,31,53 A.16 B.17 C.18 D.19 61.3,7,16,4l,( ) A.76 B.77 C.78 D.79 62.33,42,60,87,( ) A.122 B.123 C.124 D.125 63.7,11,11,15,15,( ) A.17 B.18 C.19 D.20 64.4,5,8,10,( ),20 A.15 B.16 C.17 D.18 65.66,83,102,123,( ) A.144 B.145 C.146 D.147 66.O,6,24,60,120,( ) A.186 B.210 C.220 D.226 67.18,18,36,108,( ),2160 A.308 B.360 C.432 D.2000 68.3/4,5/8,7/12,9/16,( ) A.11/18 B.9/19 C.9/20 D.11/20 69.2,11/6,5/3,3/2,( ) A.4/3 B.5/6 C.3/5 D.3/4 70.3,4,7,16,( ) A.23 B.37 C.39 D.43 71.25,15,10,5,5,( ) A.10 B.5 C.0 D.-5 72.1090020800( )070040( )005 A.1.4 B.2,5 C.3,6 D.4,8 73.5664773( )8( )991 A.8.1 B.8,2 C.7,3 D.6,5 74.20,6,18,6,16,6,( ) A.13 B.12 C.14 D.20 75.1/8,4/27,9/64,16/125,( ) A.10/210 B.25/216 C.8/302 D.25/145 76.1,3,8,15,26,( ) A.38 B.39 C.40 D.41 77.1,2,9,121,( ) A.25l B.44l C.169000 D.16900 78.2,8,26,80,( ) A.242 B.160 C.106 D.640 79.0.2,0.34,0.456,( ) A.O.56789 B.0.6789 C.O.5678 D.0.4567 80.2,10,30,68,( ) A.120 B.130 C.126 D.125
【参考答案】 41,A 42.D 43.C 44.D 45.C 46.C 47.A 48.D 49.C 50.B 51.D 52.B 53.C 54.A 55.D 56.A 57.C 58.B 59.C 60. A 61.B 62.B 63.C 64.B 65.C 66.B 67.C 68.D 69.A 70.D 71.C 72.C 73.B 74.C 75.B 76.B 77.D 78.A 79.C 80.B
【解答提示】 41.前后两数差分别为4,9,16,25,分为等于2(2),3(2),4(2),5(2)。括号里的2为上标) 42.65=8(2)+l,35=6(2)-l,17=4(2).+1,3=2(2)-1,1=0(2)+1。(括号里的2为上标) 43.等比值为3的等比数列。 44.1/4,=5/20,3/10,=6/20,7/20,2/5=8/20,此题为等差数列,等差值为1/20。 45.前后两数差分别为0,2,4,6。 46.前两数的和为第三个数。 47.128=2(7);243=3(5);64=4(3);5=5(1);1/6=6-(1)。 (括号里的数字为上标) |