ecrire sous la forme irréductible A= 1/15+1/3-3/20 B= 2/3*5/7 C= 1/3*5 D= -4*-2/13 E= 2/3/5/3 F= 3/7/2 G= -12/-49/-3/-35 Svp qui peut m’aidez merci d’avance

Bjr

A = 1/15+1/3-3/20

A = 4+20-9/60

A = 15/60

A = 1/4

B = 2/3×5/7

B = 2×5/3×7

B = 10/21

C = 1/3×5

C = 1/3×5/1

C = 1×5/3×1

C = 5/3

D = -4×-2/13

D = 8/13

E = 2/3/5/3

E = 2/5

F = 3/7/2

F = 3/7÷2

F = 3/7×1/2

F = 3×1/7×2

F = 3/14

G = -12/-49/-3/-35

G = 12/49/3/35

G = 20/7