Exercitiile sunt in atasament ,va rog urgent daca nu le fac i au 4!!!!

Răspuns:
30 m = 300 dm = 30000 mm
9 dam = 90 m = 9000 cm
55 hm = 5500000 mm = 55000 dm
8300 dm = 830 m = 83 dam
7800 m = 780 dam = 78 hm
280 hm = 28000 m = 28 km
920000 dm = 92 km