Pouvez vous m'aider svp A= 5×2/3_1/3 B= 7/4_3/4×3/2 C=(5/6_7/12)×3/5 D=3/4×2/9+28/15×25/15

Bonjour,

A= 5×2/3_1/3

A = 10/3 - 1/3

A = 9/3

A = (3 x 3) / (3 x 1)

A = 3.

B= 7/4_3/4×3/2

B = 7/4 - 9/8

B = (7 x 2) / (4 x 2) - 9/8

B = 14/8 - 9/8

B = 5/8

C=(5/6_7/12)×3/5

C = [(5 x 2) / (6 x 2) - 7/12] x 3/5

C = (10/12 - 7/12) x 3/5

C = 3/12 x 3/5

C = 9/60

C = (3 x 3) / (3 x 20)

C = 3/20.

D=3/4×2/9+28/15×25/15

D = 6/36 + 700/225

D = (6 x 1) / (6 x 6) + (25 x 28) / (25 x 9)

D = 1/6 + 28/9

D = (1 x 3) / (6 x 3) + (28 x 2) / (9 x 2)

D = 3/18 + 56/18

D = 59/18.