Of these, 0.12 meters is the largest. When everything is converted to decimeters, it would rank as follows:
1) 0.12 m (120 dm)
2) 75 dm
3) 2 dm
4) 15cm (1.5 dm)
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2 km = 20,000 dm
To compare 15 cm and 2 dm, we need to convert both measurements to the same unit. Since 1 decimeter (dm) is equal to 10 centimeters (cm), 2 dm is equivalent to 20 cm. Therefore, 2 dm is larger than 15 cm.
10 dm = 1 m so 200 dm = 20m. 20 km is 1000 times as long. This is assuming "dm" = decimetres. If it = dekametres then 200 would be 2 km.
2 dm is two decimetres The metric deci- prefix means 1/10 (tenth or 0.1) ⇒ 2 dm = 2 x 1/10 m = 0.2 m
240 cm