Bonjour !
Exercice 1 :
A = 7/6 + 2/3 B = 3/5 + 11/10
A = 7/6 + 2×2/3×2 B = 3×2/5×2 + 11/10
A = 7/6 + 4/6 B = 6/10 + 11/10
A = 11/6 B = 17/10
C = 8/9 - 2/3 D = 5 + 3/2
C = 8/9 - 2×3/3×3 D = 5×2/1×2 + 3/2
C = 8/9 - 6/9 D = 10/2 + 3/2
C = 2/9 D = 13/2
E = 3 - 5/7
E = 3×21/1×21 - 5×3/7×3
E = 63/21 - 15/21
E = 48/21
(simplifier = 16/7)
Exercice 2 :
Je ne vois pas les calculs désolé.
J'espère t'avoir aidé ! Bonne après-midi !
