(1/3+1/15+1/35+1/63+1/99+1/143)*80
(1/3+1/15+1/35+1/63+1/99+1/143)*80
1/15+1/35+1/63+1/99+1/143
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
1/3+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
9.99×22.2+33.3×3.34 1/3+1/15+1/35+1/63+1/99+1/143
计算题:1/3+1/15+1/35+1/63+1/99+1/143
1/3+1/15+1/35+1/63+1/99+1/143=?怎样简便计算?
1/3+1/15+1/35+1/63+1/99+1/143 简便计算(过程,能看懂)
1/3+1/15+1/35+1/63+1/99+1/143的简便算法(写过程)