Problème : "Tom a 10 ans. Il a 4 ans de plus que sa soeur. Quel âge a sa soeur ?" Il faut faire une soustraction... (malgré le mot PLUS dans l'énoncé) ! 

Je crois qu'il faut au contraire apprendre aux élèves à se méfier d'un mot soi-disant clé, et de bien se représenter la situation....

C'est en tout cas un bon point de départ dans la découverte du vocabulaire math! Tes affiches sont très sympas.

Heureusement qu'Ermeline est là pour me rappeler les fondamentaux : Elles sont magnifiques, ces affiches !

Très belles affiches merci.

bonjour

superbe affiche, auriez vous celles pour la multiplication et la division?

merci

Je partage l'avis de Charivari. La recherche des mots inducteurs a ses limites et peut même devenir une réelle difficulté. Il est très fréquent de rencontrer des élèves qui déterminent l'opération à réaliser pour résoudre un problème en fonction du premier mot inducteur rencontré, et pour qui les opérations ne font pas sens ("maîtresse, on fait plus ou on fait moins?"). Personnellement, je préfère travailler sur la représentation du problème et sa compréhension littérale. Mais il est sans doute envisageable, chez les plus petits, d'utiliser les mots inducteurs pour la résolution de problèmes simples si on leur en enseigne également les limites par la suite en introduisant des problèmes plus complexes, là où précisément les mots inducteurs deviennent une source d'erreur. 

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