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Contagious Maths teacher webinar
20 March 2024, 16:00
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Grille De 100
Age
5 to 7
Challenge Level
Problem
Teachers' Resources
Pour 1$^{ère}$ cycle de l'élémentaire
Mise en situation
On a imprimé une grille de 100 de chaque côté d'une feuille de papier. Les 4 coins des deux grilles correspondent exactement.
Exploration
Quel est le nombre directement en arrière de 100? De 58? De 23? De 19?
Y a-t-il un patron permettant de determiner ces nombres sans avoir à regarder?
Suggestion
Avoir des copies de grille de 100 à la portée de la main mais imprimées d'un seul côté
Source
:
Hundred Square
Translated by Renée Michaud, Coordonnatrice et consultante de mathématiques et sciences, Consortium provincial francophone pour le perfectionnement professionnel, Calgary, Canada
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