4/15=1/()+1/()=1/()+1/()=1/()+1/(),括号里可以填哪些数
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4/15=1/()+1/()=1/()+1/()=1/()+1/(),括号里可以填哪些数
4/15=1/()+1/()=1/()+1/()=1/()+1/(),括号里可以填哪些数
4/15=1/()+1/()=1/()+1/()=1/()+1/(),括号里可以填哪些数
4/15=1/(5)+1/(15)=1/(6)+1/(10)=1/(4)+1/(60)
8/9x=1/6×16/51
8/9x=16/306
x=16/306÷8/9
x=12/103
x÷6/35=26/45÷13/25
x÷6/35=10/9
x=10/9×6/35
x=4/21
18/35÷0.6×2/3
=6/7×2/3
=4/7
8/15-1/4=
2/15*( )=( )*3/4=15*( )=( )*9=1又1/5*( )=1
4/15-4/5+X=1
1-1/2+4/15-14/15-39/20=?
1/4=()/12=15/()=()/16=7/()
1-1/2+1/3-1/4+1/5-1/6+…+1/15=23*[1/( )+1/( )+1/( )+1/( )]
15/14-5/4+x=1
14/15-4/5+x=1
4x(x+1)=15
1/4x+20%x=15
4/1+x=15怎么算?
4/15+7/10-1/2=?
4*(1/20+1/15)+x*(1/10-1/25)=1 x=?
4/7-(1/9+1/8)=?1/4+1/6-2/15=?要通分.
(1+1/2)(1+1/2^2)(1+1/2^4)(1+1/2^8)+1/2^15=?
4/15=1/()+1/()=1/()+1/()=1/()+1/(),括号里可以填哪些数
1=5 2=15 3=1+25 4=2+35 5=?
2x+1/5=1-4/15解方程