Clara veut faire une raclette pour ses amis; elle prévoit donc 200 g de fromage par personne, 2,5 hg de jambon par personne, 1,500 kg de pommes de terre et deux pains de 500 g.
Quelle masse de fromage restera-t-il sur un morceau de 1,250 kg si le repas est prévu pour cinq personnes ? Quelle est la masse totale de nourriture prévue pour chaque personne ?
Lors de ce rituel, les élèves doivent tenter de résoudre un problème donné.
La démarche de résolution et la compréhension du problème donné compte plus que le résultat.
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