1-2/3-1/6-1/12-1/24-1/48-...-1/768=?

1/3+1/6+1/12+1/24+1/48 1/2+1/6+1/12+1/24+1/48+1/96=?简便计算 计算 2/3+1/6+1/12+1/24+1/48+1/96+1/192 1/3+1/6+1/12+1/24+1/48+1/96+1/192+1/384=? 1/3+1/3+1/6+1/12+1/24+1/48+1/96 1减3分之2,减6分之1,减12分之1,减24分之1,减48分之1,……768分之1怎样简算? 1—1/3 －1/6 —1/12 —1/24 —1/48 — 1/96=? 1/3+1/6+1/12+1/24+1/48+1/96简便计算 1/3-1/6-1/12-1/24-1/48-1/96 1/3+1/6+1/12+1/24+1/48+1/96的简便方法. 1/2+1/6+1/12+1/24+1/48+1/56 6分之1+12分之1+24分之1+48分之1+96分之1=?