1/15+1/35+1/63+1/99+1/143
1/15+1/35+1/63+1/99+1/143
(1-1/15)+(1-1/35)+(1-1/63)+(1-1/99)+(1-1/143)+(1-1/195)+(1-1
简算:3/1+15/1+35/1+63/1+99/1+143/1+195/1=?
1/3+1/15+1/35+1/63+1/99+1/143+1/195简便
1/15+1/35+1/63+1/99+1/143+1/195的简便算法
30*(1/15+1/35+1/63+1/99+1/143+1/195)=
(1/3+1/15+1/35+1/63+1/99+1/143)*80
30*(1/15+1/35+1/63+1/99+1/143+1/195) 简便方法
1/15+1/35+1/63+1/99+1/143+1/195用裂项做
1/3+1/15+1/35+1/63+1/99+1/143的简便运算
1/3+1/15+1/35+1/63+1/99+1/143
3/1+1/15+1/35+1/63+1/99+1/143 简便计算