Bonjour est-ce que vous pouves M’aider svp dans ce exercice et merci

Bonjour

A = 5/7 + 2

A = 5/7 + (2x 7) / (1 x 7)

A = 5/7 + 14/7

A = 19/7

B = 5/7 - 2

B = 5/7 - 14/7

B = - 9/7

C= 5/7 x 2

C = 10/7

D = 5/7 : 2

D = 5/7 x 1/2

D = 5/14.

Salut

[tex]\rule{7cm}{1mm}[/tex]

Calculer

A = 5 / 7 + 2

A = 5 / 7 + 2 / 1

A = 5 / 7 + 2 × 7 / 1 × 7

A = 5 / 7 + 14 / 7

A = 19 / 7

B = 5 / 7 - 2

B = 5 / 7 - 2 / 1

B = 5 / 7 - 2 × 7 / 1 × 7

B = 5 / 7 - 14 / 7

B = - 9 / 7

C = 5 / 7 × 2

C = 5 × 2 / 7 × 1

C = 10 / 7

D = 5 / 7 ÷ 2

D = 5 / 7 × 1 / 2

D = 5 × 1 / 7 × 2

D = 5 / 14