2.52=
2.5÷40%=
1.25×32=
0.6∶1.8=x =
5x-x=19.2 30%x+25=40
0.1÷1%=
18÷0.4=
1.25×3.3×8=
12x+7×0.3=20.1
1+19%=
1.4÷10%=
1÷25%=
3.4-1.52=
20%x-5.6=1.4