2千米380米 532-235300 3时200分
1分15秒75秒 1
6×800= 9×5+6= 310×3= 25×4+8=
206×3= 0×99+2= 323×3= 7×8-8=
________________
○=
1÷0.25= +1 = ×24= + =
400×0.02= 10÷ = 6 ×0= 3× ﹣ ×3=