Bonjour pouvez vous m’aidez pour cette exercice svp avec les détails merci exercice 1 je suis en 5ème

Bonjour,

A = 2/24 - 9/6

A = 2/24 - (9 x 4) / (6 x 4)

A = 2/24 - 36/24

A = - 34/24

A = (2 x - 17) / (2 x 12)

A = - 17/12

B = 3/8 - 2/8

B = 1/8

C = 8/8 + 8/9

C =(8 x 9) / (8 x 9) + (8 x 8) / (9 x 8)

C = 72/72 + 64/72

C = 136/72

C = (8 x 17) / (8 x 9)

C = 17/9

D = 8 - 4/3

D = (8 x 3) / (1 x 3) - 4/3

D = 24/3 - 4/3

D = 20/3

E = 4/3 - 1

E = 4/3 - (1 x 3) / (1 x 3)

E = 4/3 - 3/3

E = 1/3

F = 8/5 - 6/7

F = (8 x 7) / (5 x 7) - (6 x 5) / (7 x 5)

F = 56/35 - 30/35

F = 26/35

G = 9/4 + 2,7

G = 9/4 + (2,7 x 4) / (1 x 4)

G = 9/4 + 10,8/4

G = 19,8/4

H = 9/7 + 10/8

H = (9 x 8) / (7 x 8) + (10 x 9) / (8 x 9)

H = 72/56 + 90/56

H = 162/56

H = (2 x 81) / (2 x 28)

H = 81/28.

Réponse :

Explications étape par étape

coucou

Ex 1 :

A = 2/24 + 9/6

= 1/12 + 18/12

= 19/12

B = 3/8 - 2/8

= 1/8

C = 8/8 + 8/9

= 72/72 + 64/72

= 136/72

= 17/9

D = 8 - 4/3

= 24/3 - 4/3

= 20/3

E = 4/3 - 1

= 4/3 - 3/3

= 1/3

F = 8/5 - 6/7

= 56/35 - 30/35

= 26/35

Essaie de faire les 2 derniers !