时=分
8.3升=升毫升
3060千克=吨
平方米=0.45公顷
0.23÷0.1=
4﹣0.8=
9÷ =
1÷ - ÷1=
1.6× =
× =
+0.25=
÷ =
①2.4×( - )
②96×1 +44÷
③12.4﹣2.4×5
④[1-( + )]÷
① x-20%x=60
② x: =4:7