问题
选择题
汽车向东行驶5km记作5km,那么汽车向西行驶5km记作( )
A.5 km
B.-5km
C.10 km
D.0 km
答案
∵向东行驶5km记作5km,
∴向西行驶5km记作-5km.
故选B.
汽车向东行驶5km记作5km,那么汽车向西行驶5km记作( )
A.5 km
B.-5km
C.10 km
D.0 km
∵向东行驶5km记作5km,
∴向西行驶5km记作-5km.
故选B.