merci beaucoup pour votre aide ​

Réponse :

Bonjour

Explications étape par étape

A = 6/5 + 9/35

A = (6*7)/(5*7) + 9/35

A = 42/35 + 9/35

A = 51/35

B = 3/10 - 9/70

B = (3*7)/(10*7) - 9/70

B = 21/70 - 9/70

B = 12/70

B = (6*2)/(35*2)

B = 6/35

C = 7/3 - 4/15

C = (7*5)/(3*5) - 4/15

C = 35/15 - 4/15

C = 31/15

D = 10/3 + 10/27

D = (10*9)/(3*9) + 10/27

D = 90/27 + 10/27

D = 100/27

E = 6/5 - 4/25

E = (6*5)/(5*5) - 4/25

E = 30/25 - 4/25

E = 26/25

F = 8/15 + 4/3

F = 8/15 + (4*5)/(3*5)

F = 8/15 + 20/15

F = 28/15

Réponse :

A=6/5 + 9/35 = 42/35 +9/35 = 51/35

B= 3/10 -9/70 = 21/70-9/70 = 12/70 = 6/35

C = 7/3-4/15 = 35/15 - 4/15 = 31/15

D= 10/3 + 10/27 = 90/27 + 10/27 = 100/27

E = 6/5 - 4/25 = 30/25 - 4/25 = 26/25

F = 8/15 + 4/3 = 8/15 + 20/15 = 28/15