Réponse :
Explications étape par étape :
Bonjour
A = 2/3 + 5/6
A = 4/6 + 5/6
A = 9/6
A= 3/2
B = 7/2 + 21/6
B = 7/2 + (3×7)/(3×2)
B = 7/2 + 7/2
B = 14/2
B = 7
C = 1/12 - 1/3
C = 1/12 - 4/12
C = - 3/12
C = - 1/4
D = 2/11 + 4/9
D = 18/99 + 44/99
D = 62/99
