Bonjour j’ai besoin d’aide pour cette exercice merci d’avance

Bonsoir

Réponse :

A = 51/15

B = 15/4

C = -3/14

D = 28/45

E = 35

F = 3/14

G = -8/15

H = -6/5

I = -6/5

J = -7/4

K = -5/6

Explications étape par étape :

À = 7/5 + 6/3

A = (7 x 3)/(5 x 3) + (6 x 5)/(3 x 5)

A = 21/15 + 30/15

A = 51/15

B = 5 - 5/4

B = (5 x 4)/4 - 5/4

B = 20/4 - 5/4

B = 15/4

C = -5/14 + 1/7

C = -5/14 + (1 x 2)/(7 x 2)

C = -5/14 + 2/14

C = (-3/14)

D = 4/5 x 7/9

D = (4 x 7)/(5 x 9)

D = 28/45

E = 14/6 x 15

E = (2 x 7)/(2 x 3) x 15

E = 7/3 x 15

E = 15/3 x 7

E = (5 x 3)/3 x 7

E = 5 x 7

E = 35

F = -3/10 x -15/21

F = 3/10 x 15/21

F = 3/21 x 15/10

F = 3/(7 x 3) x (3 x 5)/(2 x 5)

F = 1/7 x 3/2

F = (1 x 3)/(2 x 7)

F = 3/14

G = 4/5 : (-3/2)

G = 4/5 x -2/3

G = (-2 x 4)/(5 x 3)

G = -8/15

H = 10/7 / (-25/21)

H = 10/7 x -21/25

H = -21/7 x 10/25

H = (-3 x 7)/7 x (5 x 2)/(5 x 5)

H = -3 x 2/5

H = (-3 x 2)/5

H = -6/5

I = 2 : -5/3

I = 2 x -3/5

I = (2 x (-3))/5

I = -6/5

J = (4/3 + 1)/(2/3 - 2)

J = (4/3 + 3/3)/(2/3 - (2 x 3)/3)

J = 7/3 / (2/3 - 6/3)

J = 7/3 / (-4/3)

J = 7/3 x -3/4

J = -3/3 x 7/4

J = -7/4

K = 1/2 - 3/4 x 16/9

K = 1/2 - 16/4 x 3/9

K = 1/2 - (4 x 4)/4 x 3/(3 x 3)

K = 1/2 - 4 x 1/3

K = 1/2 - 4/3

K = (1 x 3)/(2 x 3) - (4 x 2)/(3 x 2)

K = 3/6 - 8/6

K = -5/6