1/4+1/12+1/24+...+1/180 简便算法
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1/4+1/12+1/24+...+1/180简便算法1/4+1/12+1/24+...+1/180简便算法1/4+1/12+1/24+...+1/180简便算法1/4+1/12+1/24+.+1/1
1/4+1/12+1/24+...+1/180 简便算法
1/4+1/12+1/24+...+1/180 简便算法
1/4+1/12+1/24+...+1/180 简便算法
1/4+1/12+1/24+.+1/180
=1/4+(1/4-1/6)+(1/6-1/8)+.+(1/18-1/20)
=1/4+1/4-1/6+1/6-1/8+.+1/18-1/20
=1/4+1/4-1/20
=1/2-1/20
=10/20-1/20
=9/20
1/4+1/12+1/24+1/40.+1/19800
1/4+1/12+1/24+...+1/180 简便算法
1/4+1/12+1/24+1/40+1/84+1/112+1/144+1/180
巧算1/4+1/12+1/24+1/40+1/60+1/84+1/112
算24点1,4,10,12
(5/12+1/6-3/4)×(-24)
2,-4,12,1算24点
2,-4,12,1 24点游戏
2,—4,12,1 24点咋弄啊
x(1/12+1/24)=1
简算!4分之1+12分之1+24分之1+40分之1+60分之1
4分之1+1/12+1/24+1/40…+1/19800
1/4+1/12+1/24+1/40……+1/19800=?
4/1+12/1+24/1+40/1+.19800/1
如何巧算1/4+1/12+1/24+1/40+.+1/19800
1/4+1/12+1/24+1/40+……+1/19800=?
简便计算:(1/6-1/12)×24-4/5
(7/12+1/4-5/6+1)*(-24)