3 -1 0.5
① 12.5×32×2.5 ②
③ ④
6.3÷0.1=
3÷=
48×25%=
=
3-=
10.3-0.89=
3.14×16=
3.8+6.2 =
0.65 ÷ 1.3 =
×33=
-=
1 ÷ =
75×10%=
+×2=
2.5,-4,- , 4
时间/时
1
2
3
5
路程/km
60
120
240
360