1-54%= 54%÷0.6= ×99+= ×( )=15 0.25÷=
24÷= 5.6×= 20÷20%= 7÷= 0.03:0.81=
0.5×1.4= 12÷= 0.72÷0.8 = 7.5+9.95 =
50×20%= -25%=
0.1×25×4= 22.9÷2.29= 8×12.5%= 4.5×=
9+1÷10= ++= ÷= (+)×20=