(3+7)=()=()=()=()【】 (14-2)=()=()=()=()【】
( )+( )=( )+( )=( )+( )=( )+( )
)+1=()-3=()+3=()-2=8-()=()-4=()
(+14)+(-4)+(-2)+(+26)+(-3)= (-83)+(+26)+(-41)+(+15)=
( )x( )=2( )7
1.280/14=40/( )= ( )
33/22=()/66=66/() ()/4=36/16=72/() 7/()=14/()=35/15 14/6=()/
5+(-9)= 11-(+7)= (-12)-(+2.1)= -(-15)-(-8) (-2/3)
3.5=()(填分数)=56/( )=():14=()%
( )分之20=0.35 = ( ) : ( ) = ( )分之14 = ( ) ÷( )=( )%
75/()=()/40=9:()=3/()=()/16=0.75
( )/( )=0.618
14:( )=30分之( )=0.7=7除( )=70%