30.6÷8.5=
0.306 ÷0.85=
0.36 ×85=
36×8.5=
30.6 ÷850=
306 ÷0.36=
72÷3.8≈
75.6÷1.8=
8.91÷0.27=
2.6÷0.13=
0.21÷1.4=
1.12÷0.56=
7.35÷2.1=
19.8÷45=
1÷0.025=
2.5×103 =
0.702×15=
3.15×0.14=
总箱数
200
400
600
800
每次运的箱数
50
运的次数