365+199= 40÷90= 0.8÷10%= 5.98+0.2= 2.5×400=
- = ÷ = 1÷ = + = × ÷ × =
载重/吨
4
6
10
12
15
20
运送次数/次
30
x
5
y
m
6.12+0.7﹣1.12= 10﹣﹣= 23=
1÷1%= 1.5π≈ 0.5××2×=