1 dm = 10 cm so 4 dm = 40 cm...
200 centimeters=20 decimeters
4
4 dm is greater than 400mm
18.3 dm is longer.
1 km = 10 dm
8
4 dm
1 dm
Km
200cm = 2m ...
2000 dm is the same as 200 m. 2000 dm is longer than 20 m, not bigger.
The conversion between cm and dm are given .On finding the relation we get as follows . 1 dm=10 cm . It means decimeter is longer than cm.