Répondre :
Explications étape par étape:
A = 72/30 + 20/30 = 92/30
B = 16/20 + 7/20 = 23/20
C = 44/9 + 15/9 = 59/9
D = 15/21 + 12/21 - 7/21 = 20/21
E = 33/25 - 30/25 + 7/25 = 10/25 = 2/5
Explications étape par étape:
A = 72/30 + 20/30 = 92/30
B = 16/20 + 7/20 = 23/20
C = 44/9 + 15/9 = 59/9
D = 15/21 + 12/21 - 7/21 = 20/21
E = 33/25 - 30/25 + 7/25 = 10/25 = 2/5