Exercice 2 : vous pouvez m’aidez merci ! Bonne soirée !

Bonjour,

A = 8/5 + 7/5 x 3/5

A = 8/5 + 21/25

A = (8 x 5) / (5 x 5) + 21/25

A = 40/25 + 21/25

A = 61/25

B = 53/60 - (6/10 + 8/10)

B = 53/60 - 14/10

B = 53/60 - (14 x 6) / (10 x 6)

B = 53/60 - 84/60

B = - 31/60

C = 7/6 x 7/2 - 3/2

C = 49/12 - 3/2

C = 49/12 - (3 x 6) / (2 x 6)

C = 49/15 - 18/12

C = 31/12

D = 3/7 + (17/14 - 23/28)

D = (3 x 4) / (7 x 4) + [(17 x 2) / (14 x 2) - 23/28]

D = 12/28 + (24/28 - 23/28)

D = 12/28 + 1/28

D = 13/28

E = (8/5 + 7/5) x 3/5

E = 15/5 x 3/5

E = 45/5

E = (5 x 9) / (5 x 1)

E = 9

F = 53/60 - 6/10 + 8/10

F = 53/60 - [(6 x 6) / (10 x 6) + (8 x 6) / (10 x 6)]

F = 53/60 - (36/60 + 48/60)

F = 53/60 - 84/60

F = 31/60

G = 7/6 x (7/2 - 3/2)

G = 7/6 x 4/2

G = 28/12

G = (4 x 7) / (4 x 3)

G = 7/3

H = 3/7 + 17/14 - 23/28

H = (3 x 4) / (7 x 4) + (17 x 2) / (14 x 2) - 23/28

H = 12/28 + 34/28 - 23/28

H = 46/28 - 23/28

H = 23/28.