Aidez moi svp l’ex 1 et 2

Réponse :

Explications étape par étape

Réponse :

Explications étape par étape

Bonsoir

Exercice 1 :

Simplifier le plus possible :

16/14 = (2 x 8)/(2 x 7) = 8/7

12/9 = (3 x 4)/(3 x 3) = 4/3

30/15 = (15 x 2)/15 = 2

7/21 = 7/(3 x 7) = 1/3

50/30 = (5 x 10)/(3 x 10) = 5/3

28/42 = (14 x 2)/(14 x 3) = 2/3

84/30 = (14 x 6)/(5 x 6) = 14/5

Exercice 2 :

Calculer les expressions suivantes :

A = 3/5 x 15/6

A = 15/5 x 3/6

A = (3 x 5)/5 x 3/(2 x 3)

A = 3 x 1/2

A = 3/2

B = 14/11 x 33/7

B = 33/11 x 14/7

B = (3 x 11)/11 x (2 x 7)/7

B = 3 x 2

B = 6

C = 2/3 x 3/8

C = 3/3 x 2/8

C = 2/(2 x 4)

C = 1/4

D = 3/2 x 2/5 x 15/6

D = 2/2 x 15/5 x 3/6

D = (3 x 5)/5 x 3/(2 x 3)

D = 3 x 1/2

D = 3/2