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Sagot :

Bonjour,

0,8 km = 800m
350 cm = 3,5m

55hm = 5 500 m

0,25 dm = 0,025m

1255um = 0.001255 m

500 dam  = 5 000m

25 000cm² =  2,5m²

35dm²  = 0,35m²

2 800mm² = 0,002800m²

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