1+75%= 0.24×50= ÷2= 0÷ =
58+62= 1.5×0.2= 0.63÷0.7= 10%×10=
-0.5= ÷8= - × = 1- + =
1.25×8= 0.52= a- a= ÷ × =
时间/时
1
2
3
4
5
6
路程/km
80
160
240
320
400
480