Bonjour Pouvez-vous m’aider pour l’exercice 21 svp Merci

Bonjour !

A ) 7/24-5/8

7/24 - 5x3/8x3 =

7/24 - 15/24 = -8/24 = -1/3

B) -5/18 - 11/6

B = -5/18-11x3/6x3 =

B = -5/18 - 33/18 = -38/18 = -19/9

C) 11/45-(-5/9)

C = 11/45 - (-5x5/9x5) =

C = 11/45 + 25/45 = 36/45 = 4/5

D) -8/7 - (-10/21)

D = -8x3/7/3 + 10/21

D = -24/21 + 10/21 = -10/21

Bon courage .