1/4,2/5,5/7,1,17/14,( ) A.25/17 B.26/17 C.25/19 D.26/19
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1/4,2/5,5/7,1,17/14,( ) A.25/17 B.26/17 C.25/19 D.26/19
1/4,2/5,5/7,1,17/14,( ) A.25/17 B.26/17 C.25/19 D.26/19
1/4,2/5,5/7,1,17/14,( ) A.25/17 B.26/17 C.25/19 D.26/19
1看作10/10
分母是4 5 7 10 14 (19)
间隔是1 2 3 4 5
分子是1 2 5 10 17 (26)
间隔是 1 3 5 7 9
所以选D
5/2 7/5 1 14/17 ( )
数字推理题 ( ),17/14,1,5/7,2/5,1/4
1/4 2/5 5/7 1 17/14 下一个数是多少?
1/5+2/7+5/8+1/6+2/7+5/9-4/7+2/5+1/7+3/8-12/15+14/17=?
1.0.7×19 4/9+2 3/4×-14+0.7×5/9+1/4×-14 2.-36×-4/9+5/6-7/12 3.99 7/8×-13 4.-17×-3 1/170.7×19 4/9+2 3/4×-14+0.7×5/9+1/4×-14 2.-36×-4/9+5/6-7/12 3.99 7/8×-13 4.-17×-3 1/17
5/14除以[ 17/28减(1/4加2/7) ] 要简便
5/11*17+17/11*6(13+26/27)*1/135/8*3/5+1/2*1/4(5/7-3/14*2/3)*49/15
1/4,2/5,5/7,1,17/14,( ) A.25/17 B.26/17 C.25/19 D.26/19
1*2*3+2*4*6+7*14*21/1*3*5+2*6*10+17*21*35=?
(+32)+(-17)+56又1/2+(+68)+(-1.57)+(-1.43)+(-36.5)简算(+3/7)+(-5/14)+(-2/5)+(+4/7)+(+2/25)+(-9/14)
找规律填数 1,5,4,7,9,14,( ),33,( )8,17,9,5,14,9,( ),4,162/3,2/3,7,10,20,( ),( )
(2/3-1/6-1/5×1/6)÷(1/5+1/6) 25/2+5/3÷4-5/7×14/5 29/5+21/5×17/7-17/7 以上简便计算或计算解方程:2/5÷a÷2/3=3/5 a÷1/2+1/4=2/5
分别写出一个通项公式(1)-1,1/8,-1/27,1/64,-1/125,.(2)3/5,4/8,5/11,6/14,7/17,...
5-2又17分之14-1又7分之34又5分之4-(2又5分之4+12分之5)
15/14-1/6 3/7+5/8 3/17+4/7 13/28-2/7 4/7-1/5 6/11-2/9 27/54+3 13/14+24/33 19/36-2/5
(8/7,0.63,24/17) (14/29,1又8/5,2)(8/7,0.63,24/17) (14/29,1又8/5,2) (0.8,10/7,0.26,4/1,42/11)把这些从大到小排列
5/7+(1/4-9/14) 13/25+1/5—7/15 12/17+(1/4+1/2)5/7+(1/4-9/14)13/25+1/5—7/1512/17+(1/4+1/2)
1,2,4,7,11,()2,5,10,17,26,()