Correction des exercices. Exercice 1. a) 10 ans = 10 × 1 an b) 6,3 h = 6,3 × 1 h c) 4 h = 4 × 1 h = 10 × 12 mois = 6,3 × 60 min = 4 × 3 600 s = 120 mois = 378 min = 14 400 s d) 1,3 h = 1,3 × 1 h e) 2,7 h = 2,7 × 1 h f) 6 semaines = 6 × 1 semaine = 1,3 × 60...
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Correction des exercices. Exercice 1. a) 10 ans = 10 × 1 an b) 6,3 h = 6,3 × 1 h c) 4 h = 4 × 1 h = 10 × 12 mois = 6,3 × 60 min = 4 × 3 600 s = 120 mois = 378 min = 14 400 s d) 1,3 h = 1,3 × 1 h e) 2,7 h = 2,7 × 1 h f) 6 semaines = 6 × 1 semaine = 1,3 × 60 min = 2,7 × 3 600 s = 6 × 7 jours = 78 min = 9 720 s = 42 jours Exercice 2. a) 2 h 32 min = 2 h + 32 min b) 1 jour = 24 h = (2 × 1 h) + 32 min = 24 × 1 h = (2 × 60 min) + 32 min = 24 x 60 min = 120 min + 32 min = 1 440 min = 152 min c) 3 h 2 min 47 s = 3 h + 2 min + 47 s = 3 x 1 h + 2 x 1 min + 47 s = 3 x 3 600 s + 2 x 60 s + 47 s = 10 800 s + 120 s + 47 s = 10 967 s Exercice 3. a) 91 jours = 91 x 1 jour b) 3 966 s = 3 966 x 1 s c) 19 080 s = 19 080 x 1 s 1 1 1 = 91 x semaines = 3 966 x min = 19 080 x min 7 60 3600 91 3966 19080 = semaines = min = h 7 60 3600 = 13 semaines = 66,1 min = 5,3 h Exercice 4. Méthode 1. Méthode 1. a) 7 h 36 min = 7 h + 36 min a) 7 h 36 min = 7 h + 36 min = (7 × 1 h) + 36 min = 7 h + 36 60 h = (7 × 60 min
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