1/4+1/28+1/70.+1/9700
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1/4+1/28+1/70.+1/9700
1/4 +1/28 +1/70 +1/130 +1/208
(28+1/4)*1/4等于多少
1/4+1/28+1/70+1/130简算
1/4+1/28+1/70+.+1/9700=?
1/4+1/28+1/70+.+1/9700=?
1/4+1/28+1/70+.+1/8554=?
1/4+1/28+1/70+1/130
1/4+1/28+1/70+1/130=?
1/4+1/28+1/70+1/130.1/10300
1/4+1/28+1/70+…1/89698=?
28+4分之1=?
1/4+1/4*1/7+1/7*1/10+...1/25*1/28=?
(1/2-1/3)+(1/4-1/5)+(1/7-1/10)+(1/14-1/15)+(1/28-1/30)（1/2-1/3)+(1/4-1/5)+(1/7-1/10)+(1/14-1/15)+(1/28-1/30)
1/1×4+1/4×7+1/7×10+...+1/22×25+1/25×28
（1）1+1/2+1/3+1/4+1/5+1/6+1/7+1/14+1/28
(1/4x+28)/4=[(1-1/4)x-28]/5的过程
1|4+1|28+1|70+1|130+1|208+1|304