How many meters in 4 and a half kilometers?

10 millimeters = 1 centimeter

10 centi meters = 1 decimeter

10 decimeters = 1 meter

10 meters = 1 decameter

10 decameters = 1 hectometer

10 hectometers = 1 kilometer

.......now 1000m =1 km

then 4500m = 4.5 km