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Réponse :

Explications étape par étape

Bonjour

A = 5/3 + 11/3

A = (5 + 11)/3

A = 16/3

B = 25/10 - 8/10

B = (25 - 8)/10

B = 17/10

B = 1,7

C = 2/3 + 2/21

C = (2 x 7)/(3 x 7) + 2/21

C = 14/21 + 2/21

C = 16/21

D = 9/20 - 3/4

D = 9/20 - (3 x 5)/(4 x 5)

D = 9/20 - 15/20

D = (9 - 15)/20

D = (-6)/20

D = (-3 x 2)/(10 x 2)

D = -3/10

E = -4/7 + 3/6

E = (-4 x 6)/(7 x 6) + (3 x 7)/(6 x 7)

E = -24/42 + 21/42

E = (-24 + 21)/42

E = -3/42

E = -3/(3 x 14)

E = -1/14

F = 1/2 - 1/3

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

F = 3/6 - 2/6

F = (3 - 2)/6

F = 1/6

G = -3/4 + 3

G = -3/4 + (3 x 4)/(1 x 4)

G = -3/4 + 12/4

G = (-3 + 12)/4

G = 9/4

H = 1 - 7/10

H = (1 x 10)/10 - 7/10

H = 10/10 - 7/10

H = (10 - 7)/10

H = 3/10

H = 0,3