x:10=6:5 = 0.4:3.2=x:9.6
477﹣199=
5%÷0.01=
36×99=
15﹣+=
5÷﹣÷5=
6.7×0.25×4=
0.4×12.5×8×2.5=
×5÷×5=
x÷=4 x+60%x=22 3.6 :1.2=
(x-0.5)÷3=
5:3=:9 4:6=:3.6 3:4=42:
5:=0.5:0.7 :3=9:2.7 =4: