Multiplication et addition de fractions


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PDF Introduction : Addition et Soustraction de fractions

Je sais multiplier deux fractions Propriété : Pour multiplier deux fractions entre elles on multiplie les numérateurs entre eux et les dénominateurs entre eux × = × × Exemple : 4 3 4 × 3 = 6 5 × 6 12

PDF Les fractions

Nous allons étudier maintenant les 4 opérations sur les fractions : l’addition la soust >action la multiplication et la division de fraction 1 Addition et soustractions de fractions qui ont le même dénominateur Quand on additionne/soustrait 2 fractions qui ont le même dénominateur il

La multiplication des fractions  Mathématiques  Alloprof

La multiplication des fractions Mathématiques Alloprof

Laddition de fractions  Mathématiques  Alloprof

Laddition de fractions Mathématiques Alloprof

Additionner des fractions ✅ exemples faciles  Maths

Additionner des fractions ✅ exemples faciles Maths

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1.
  • Règle : Pour additionner et soustraire des fractions, elles doivent avoir le même dénominateur. ...
  • A retenir : si le nombre n'a pas de « dénominateur », c'est qu'il vaut 1 :
  • Règle : Pour multiplier des fractions on multiplie les numérateurs entre eux et les dénominateurs entre eux.

Comment faire addition et multiplication ?

La méthode de multiplication de fractions est plutôt simple. On doit multiplier les numérateurs ensemble et les dénominateurs ensemble.
. On obtient ainsi une nouvelle fraction qui correspond au produit final.

Quand il y a une addition et une multiplication ?

a) En l'absence de parenthèses, la multiplication et la division sont prioritaires sur l'addition et la soustraction Priorité des calculs: parenthèses, puis multiplication (ou division), puis addition (ou soustraction).










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