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
