2,12,30,56() 2,5,14,41()() 2,5,13,36,104()
算36点 (1)12,13,14,16 (2)3,16,17,25 (3)5,5,9,9 (4)9,10,11,13 (
(-56)除(-12+8)+(-2)乘5
找规律 1,2,5,14,41,122,()
1/2+5/6-7/12+9/20-11/30+13/42-15/56 (简便运算)
(-5)*13/3+(-5)*(-13/2)-5*13/1+0.125*(-13/14)*(-8)
数字推理,2,12,30,56,()
找规律:2,12,30,56,( )
(5/6-5/14×5/2)除29/30
观察下列各组勾股数(3,4,5)、(5,12,13)、(7,24,25)、(9,40,41)可发现:4=3*2-1/2,
用简便方法计算!2/7x5/9x(36x28) 7/9÷13/5+2/9x5/13(5/6-7/12x15/14)÷5/
找规律:7 13 6 32 3 5 8 12 4 36 7 2 4 ()13 () 3 4
1,2,5,14,( ).