Pouvez vous m’aider pour le 53 merci d’avance

Bonjour

a. - 2 + 4/5 + 5/6

= (- 2 x 30) / (1 x 30) + (4 x 6) / (5 x 6) + (5 x 5) / (6 x 5)

= - 60/30 + 24/30 + 25/30

= - 60/30 + 49/30

= - 11/30

b. 1/2 + 2/3 + 3/4

= (1 x 6) / (2 x 6) + (2 x 4) / (3 x 4) + (3 x 3) / (4 x 3)

= 6/12 + 8/12 + 9/12

= 23/12

c. - 2 + 1/8 - 5/16

= (- 2 x 16) / (1 x 16) + (1 x 2) / (8 x 2) - 5/16

= - 32/16 + 2/16 - 5/13

= - 37/12 + 2/16

= - 35/16

d. 5/16 - 7/24 + 1

= (5 x 3 )/ (16 x 3) - (7 x 2) / (24 x 2) + (1 x 48) / (1 x 48)

= 15/48 - 14/48 + 48/48

= 63/18 - 14/48

= 49/48.