×30= 0.5+ = ÷ =
- = × ÷ =
列式:
10×12=
1﹣0.04=
2+5.8=
4.5÷0.45=
+ =
1.2﹣ =
÷ =
2.5×4÷4=
+ ÷ + =
0÷( ﹣ )=