3.2立方分米=升=毫升 3 时=时分
①4x-4=2
②
③7(x+ )=4.2
④=2.7:0.6
× =
5÷0.4=
0÷12=
1- =
12×2.5×4=
÷ =
0.89÷100=
2.8×0.1=
=
3.4÷8÷12.5=