Question

500 dam a km =
21 hm a dam=
80 m a dam=
7 hm a dm=
2000 m a km=

Answer 1

1) 500 dam equivalen a 5 Km
2) 21 hm equivalen a 210 dam 
3) 80 m equivalen a 8 dam
4) 7hm equivalen a 7000 dm
5) 2000 m equivale a 2km