47 Convertir des km/h en m/s. 1° Recopier et compléter : 60 km 1 h a) 60 km/h = .. km m ... S m ... m/s b) 801 km/h ... m/s ... h 2° De la même manière, convertir en m/s : a) 27 km/h; b) 45 km/h; c) 54 km/h. ... S​
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