Bonjour,

2 860 cm = 2 dam 8 m 6 dm

2 452 dm = 2 hm 4 dam 5 m  2 dm

492 dam = 4 km 9 hm 2 dam

7 820 mm = 7 m 8 dm 2 cm

1 001 m = 1 km 1 m

2 091 cm = 2 dam 9 dm 1 cm

4 792 mm = 4 m 7 dm 9 cm 2 mm

1 000 dm = 1 hm