Bonjour vous pouvez m'aider à faire cet exercice le 2 svp j'en ai besoin

Bonsoir,

A = 7/10 - 7/8

A = (7 x 4) / (10 x 4) - (7 x 5) / (8 x 5)

A = 28/40 - 35/40

A = - 7/40

B = 7/8 + 5

B = 7/8 + (5 x 8) / (1 x 8)

B = 7/8 + 40/8

B = 47/8

C = 8,3 - 3/7

C = (8,3 x 7) / (1 x 7) - 3/7

C = 58,1/7 - 3/7

C = 55,1/7

D = 6/10 + 7/2

D = 6/10 + (7 x 5) / (2 x 5)

D = 6/10 + 35/10

D = 41/10

E = 10/7 - 4/9

E = (10 x 9) / (7 x 9) - (4 x 7) / (9 x 7)

E = 90/63 - 28/63

E = 62/63

F = 2/8 + 4/3

F = (2 x 3) / (8 x 3) + (4 x 8) / (3 x 8)

F = 6/24 + 32/24

F = 38/24

F = (2 x 19) / (2 x 12)

F = 19/12.

G = 1 - 2/3

G = (1 x 3) / (1 x 3) - 2/3

G = 3/3 - 2/3

G = 1/3

H = 8/9 - 1/9

H = 7/9.