2/3:4/54/7:16/212/25:2/152.7:18.5
1/3×5/16×3/5、 1/2×[(1/18-1/54)÷1/54、 2/3÷4/15÷25、 4/5×[(2/3+
数字找规律4,3/2,20/27,7/16,36/125,11/54如题
2 3 7 16 25 65 321
4, 3/2, 20/27, 7/16, 36/125,()A.39/144 B11/54 C.68/196 D.7答案
4,3/2,20/27,7/16,36/125,( A.39/144 B.11/54 C.68/196 D.7
解方程:1/2x+1/8x=25/54 x÷2/7×3/4=12
求tan12-根号3/(4cos^212-2)*sin12
数学多项式计算题1.(14x^212x^3y+16x^4y^3)/(-4x^2)2.(16×10^17)/(0.2×10
化简:1:√9*49 2::√16*7 3:√ 12/25 4::√27
急!小学找规律数学题2,3,4,7,9,15,16,31,25,( ),( ).
3/4*1/6+2/3*1/4 15/16*15 53/54* 55 简便计算
2/3-2/1=-4/3 3/8-3/5=-9/40 4/11-4/7=-16/77 5/14-5/9=-25/126