Efectuează transformările:.

A) 57 hm - 570 dam
39 hm - 390 dam
107 hm - 1070 dam
B) 79 km - 7900 dam
330 km - 33000 dam
800 km - 80000 dam
C) 25 km - 25000 m
890 km - 890000 m
6 km - 6000 m
D) 230 hm - 23 km
4500 hm - 450 km
9070 hm - 907 km