①x+36=100
②0.3x+3.2×5=22
③0.35:=x:6
910÷70=
4.6+6.4=
1+2%=
×=
120÷50%=
×7.2=
×0÷3=
×98=
1-x= = :x=3×
①75+25%x=300
②
③