+(+5)=?+(-9)=?

+(+5)=?+(-9)=? 5-9=5+( )=( ) 9*56*5=? 8*8+6*9*9*9*9* 9*9+9-9*9*9*5*6= 从+,-,×,÷,【】中选去适当的符号添在等号左边,使等式成立5 5 5 5 5 =1 5 5 5 5 5 =3 9 9 9 9 9 =3 5 5 5 5 5 =2 5 5 5 5 5 =4 9 9 9 9 9 =20应该是9 9 9 9 9 =17 1/9=0.111111.,2/9=0.222222.,3/9=0.333333.,5/9=0.555555.,那么9/9=? 4/9+5/9= 1-5/8= 9/5+5x=10/5 45+(-9)+(-91)+5=? 45÷5/9=? 23-9x=5, 9+45+5=多少 5/3+45/9= x:9=5:7 x/3.6=5/9 6/8-5/9=? 5x+9=19 7/3+9/5=?