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Réponse :

Explications étape par étape

Bonjour

A = 3 + 2/7

A = (3 x 7)/7 + 2/7

A = 21/7 + 2/7

A = 23/7

B = 2/5 - 4/3

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

B = 6/15 - 20/15

B = (-14/15)

C = 55/18 x 24/44

C = 55/44 x 24/18

C = (5 x 11)/(4 x 11) x (6 x 4)/(6 x 3)

C = 5/4 x 4/3

C = 5/3 x 4/4

C = 5/3

D = 14/45 : 21/25

D = 14/45 x 25/21

D = 14/21 x 25/45

D = (2 x 7)/(3 x 7) x (5 x 5)/(9 x 5)

D = 2/3 x 5/9

D = 10/27

E = 2/7 + 3/7 x 21/15

E = 2/7 + 21/7 x 3/15

E = 2/7 + (3 x 7)/7 x 3/(3 x 5)

E = 2/7 + 3 x 1/5

E = 2/7 + 3/5

E = (2 x 5)/(7 x 5) + (3 x 7)/(5 x 7)

E = 10/35 + 21/35

E = 31/35

F = 3 - 5/3 : 25/12

F = 3 - 5/3 x 12/25

F = 3 - 12/3 x 5/25

F = 3 - 4 x 1/5

F = 3 - 4/5

F = 15/5 - 4/5

F = 11/5

G = (2/3)^3 x (4 + 5)/4

G = 8/27 x 9/4

G = 9/27 x 8/4

G = 1/3 x 2

G = 2/3

H = [-2^2 + 2 x (1 - 3)^2] / (2V2)^2

H = (-4 + 2 x (-2)^2) / (4 x 2)

H = (-4 + 2 x 4) / 8

H = (-4 + 8) / 8

H = 4/8

H = 1/2

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

I = -2/(4/6 - 9/6)

I = -2/(-5/6)

I = -2 x -6/5

I = 12/5

K = 2 - 1/(1/3 - 2/5)

K = 2 - 1/(5/15 - 6/15)

K = 2 - 1/(-1/15)

K = 2 + 1/15

K = 30/15 + 1/15

K = 31/15

L = (1 - 7/2)(2 + 5/3)

L = (2/2 - 7/2)(6/3 + 5/3)

L = (-5/2)(11/3)

L = -55/6