1,3,2,6,4,--,--,12,16,.规律怎么找.要意思

填空:1,3,2,6,4,(),(),12,(), 12×1/2+6×4/3,= 1/3+2/6+4/12= 找规律,1 3 2 6 4 ( ) ( ) 12 (找规律,1 3 2 6 4 ( ) ( ) 12 ( ) 找规律填空：1/12,1/6,1/4,1/3,5/12,1/2,（）. 按规律写数:1/12,1/6,1/4,1/3,5/12,1/2,( ) 1/2+3/4-1/6+5/12=? 1/2+1/3+1/4+1/6+1/12+1/48+1/56 1×2×4+2×4×8+2×6×12分之1×3×24+2×6×8+3×6×12 求规律,填空.1,3,2,6,3,12,4,( ). 递等式计算 1/2-1/3+1/4-1/5+1/6-1/12 1/2-1/3+1/4-1/5+1/6-1/12 简便计算下题.1/2-1/3+1/4-1/5+1/6-1/12 1/2+1/6+1/12+1/20+1/30;1/2×3+1/3×4+1/4×5+1/5×6+1/6x7 1+(-2)+|-2-3|-5 (1/4-1/16-1/6+1/12)x(-48) 这两题 48*(1/12+1/6-3/4) (-1/6+3/4-1/12)*(-48) 2/1 3/1 4/1 5/1 6/1 8/1 10/1 12/1 15/1 20/1