Collège – 5e – Mathématiques – Prioritéw opératoires (Fiche pédagogique)

Exercice 1 : Identifier les Priorités

Objectif pédagogique : Comprendre et identifier les priorités opératoires dans une expression mathématique.

Consigne pour l’élève : Lis les expressions suivantes et entoure les opérations qui doivent être effectuées en premier selon les règles de priorité opératoire.

Exercice à réaliser :

1. ( 5 + 3 times 2 )
2. ( (8 – 4) div 2 )
3. ( 7 times (6 + 2) )
4. ( 9 + 12 div 3 times 2 )
5. ( (3 + 5) times 2 – 4 )

Matériel requis : Aucun

Temps estimé : 10 minutes

Corrigé détaillé :

1. ( 5 + underline{3 times 2} )
2. (underline{(8 – 4)} div 2)
3. (7 times underline{(6 + 2)})
4. (9 + underline{12 div 3} times 2)
5. (underline{(3 + 5)} times 2 – 4)

Différenciation pédagogique :

• Remédiation : Propose des expressions plus simples, par exemple ( 2 + 3 times 4 ).
• Approfondissement : Ajoute des expressions avec des puissances, par exemple ( 2^3 + 4 times 2 ).

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Exercice 2 : Compléter les Calculs

Objectif pédagogique: Appliquer les règles de priorité opératoire pour compléter des calculs.

Consigne pour l’élève : Complète les calculs suivants en respectant les priorités opératoires.

Exercice à réaliser :

1. ( 6 + 2 times 3 = ________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

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