1=3/3=( )/4=5/( )=( )/8=21/( )=( )/30
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1=3/3=( )/4=5/( )=( )/8=21/( )=( )/30
1=3/3=( )/4=5/( )=( )/8=21/( )=( )/30
1=3/3=( )/4=5/( )=( )/8=21/( )=( )/30
1=3/3=( 4)/4=5/(5 )=( 8)/8=21/( 21)=(30 )/30
2*()=1/4/()=5*()=1/3*()=()
4/3×-()=2/5×()=12/7×()=5×()=1
1=3/3=( )/4=5/( )=( )/8=21/( )=( )/30
3/4×()=2/7÷()=()×0.2=3-()=()+1/5=1
( )x 1/20=4/5+( )=( )÷3/4=1
12÷(3/4÷1/5) = =
3:( )=16分之( )=5/( )=1:4=( )(填小数)
填---填2+2=1+( )4-1=5-( )5-3=( )-2( )-4=3-2
5-3(x-1/3)=4/3
(3/5-1/4)+3/5=?要约分.
1=5 2=15 3=25 4=35 5=1 6=()
8-16= 0-(-30)= 21-(+32)=()+(-8)=-12(-20)-(-4)=(-4)-(-4)=(-8)-5=(+6)+()=-2010-18=(-14)-(-26)=(-4.3)-6.7=2.5-(-3.5)=(-2/3)-1/2=(-3/4)-(-1/3)=
)+1=()-3=()+3=()-2=8-()=()-4=()
():12=4:3 25:()=5:1 51:17=39:()
定义式新算:1#2=2#1=3 (-3)#(-4)=(-4)#(-3)=-7/6 (-3)#5=5#(-3)=-4/15 那么a#b=( )过程是什么,求过程!
8/7*()=5/12除以()=4/3*()=()5/11=1
数学题(+1/5)-(+1/4)+(-3/5)-(-6又3/4)=?
如果1=5 2=25 3=125 4=925则5=?(5不等于5)