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.
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there are 200 cm in 20 dm
1 dm = 10 cm so 20 dm = 20*10 = 200 cm. Simple!1 dm = 10 cm so 20 dm = 20*10 = 200 cm. Simple!1 dm = 10 cm so 20 dm = 20*10 = 200 cm. Simple!1 dm = 10 cm so 20 dm = 20*10 = 200 cm. Simple!
No.
890 cm = 8900 mm 9 dm = 900 mm So, 890 cm is greater than 9 dm.
Greater.