Réponse:
1)
- le mètre
- km2
- litre
2) km hm dam m dcm cm mm
3)
1km =100m
10 500 m = 10,5 km
325 cm = 3,25 m
1ha = 10000 m2
125 g = 0,125kg
3,5min = 210 sec
1m³ = 1000 L
1dm3 = 1L
1t = 1000 kg
1kg = 1000g
2,5h = 150min
1h = 3600sec
