Réponses

  • Utilisateur Brainly
2014-01-28T18:33:01+01:00
Bonjour,

1H = 60min

1/3 d'heure + 1/2 heure = 20min+30min = 50 min
1/3 H = (60/3) = 20

1/6H + 5/12h =
1/6h = 60/6 = 10min
5/12h =( 60*5)/12 = 25min
35min

7/20h+2/3h=
7/20 = (7*60)/20 = 21min
2/3h = (60*2)/3 = 40min
61min