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Exercice n°5: Changement d'unités. Compléter les espaces grisés
t = 1,25h =…….h……..min
=
t = 2 h 45 min=…………h
v = 12 km/s=……….km/min


1 = 3456 m = ……..km
V = 345 m³ =………dm3
v = 2m/s =………km/h



Répondre :

Bonjour,

Réponse :

t = 1,25h = 1h15min (0,25h = 1/4h = 15min)

t = 2h45 min = 2,75h (45min = 3/4h = 0,75h)

v = 12km/s= 720km/min (12km/s = 12km × 60/1s × 60 =  720km/60s = 720km/min)

1 = 3456m = 3,456km

V = 345m³ = 345000dm³

v = 2m/s = 7,2km/h (2m/s = 2m × 3600/1s × 3600 = 7200m/3600s = 7,2km/h)