1/5=1/( )-1/( )-1/( ) 求这题用什么方法解答
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1+1+1+1+1+1+1×5=?
(1/7.5+1/5)+1/5(x-1)=1
1+1+1+1+0+1 1+4+1+1+1+1 0+1+1*5-5=?
1+1+1+1+1+1+1+1+1×5×0+50=
(1+1/2)*(1-1/2)*(1+1/3)*(1-1/3)*(1+1/4)*(1-1/4)*(1+1/5)*(1-1/5)=?
5/1x-2/1=1
(1+x)(1-5%)=1+14%
巧算:(1+1/2+1/3+1/4+1/5)*(1/2+1/3+1/4+1/5+1/6)-(1+1/2+1/3+1/4+1/5+1/6)*(1/2+1/3+1/4+1/5)(1+1/2+1/3+1/4+1/5)*(1/2+1/3+1/4+1/5+1/6)-(1+1/2+1/3+1/4+1/5+1/6)*(1/2+1/3+1/4+1/5)=====
1/7.5+1/5+1/5*X=1
1-1/2+1/3-1/4+1/5-1/6+1/7.-1/50=?
1-1/2+1/3-1/4+1/5-1/6+…+1/15=23*[1/( )+1/( )+1/( )+1/( )]
口算 1/4+1/5= 1/5+1/8= 1/4-1/6=
一道无聊数学题,谁答最快选谁1-1-1-1-1-1-1-1-1-1-1-1-1-1-1-1-1-2-5-5-5-5-8-62-5-5-5-4-5-6=?
数学题(1/4+1/5+1/6+...+1/671)(1/3+1/4+1/5+..+1/670)-(1/3+1/4+1/5+...+1/671)(1/4+1/(1/4+1/5+1/6+...+1/671)(1/3+1/4+1/5+..+1/670)-(1/3+1/4+1/5+...+1/671)(1/4+1/5+1/6+...+1/670)=?
(1/3+1/5+1/7)*(1/5+1/7+1/9)-(1/3+1/5+1/7+1/9)*(1/5+1/7)=?
1+1+1=?
(1-1/2)(1/3-1)(1-1/4)(1/5-1)…(1-1/50)=
1+1+1-1=?.