bonjour pouvez vous m'aider j'ai rien compris je suis pèrdu mon prof m'aide pas et c'est noté il faut mettre le détails des calculs et réduire les fraction sous

Réponse :

Explications étape par étape

Bonsoir

A = 7/9 + 9

A = 7/9 + (9 x 9)/9

A = 7/9 + 81/9

A = 88/9

B = 9/2 + 6/7

B = (9 x 7)/(2 x 7) + (6 x 2)/(7 x 2)

B = 63/14 + 12/14

B = 75/14

C = -1/2 + (-4/8)

C = -1/2 - 4/(2 x 4)

C = -1/2 - 1/2

C = -2/2

C = -1

D = 4/9 + (-1/6)

D = (4 x 2)/(9 x 2) - (1 x 3)/(6 x 3)

D = 8/18 - 3/18

D = 5/18

E = -12/5 + 9/7 - 8/5

E = (-12 - 8)/5 + 9/7

E = (-20/5) + 9/7

E = (-4 x 5)/5 + 9/7

E = -4 + 9/7

E = (-4 x 7)/7 + 9/7

E = -28/7 + 9/7

E = -19/7

F = 25/15 - (-12/15)

F = 25/15 + 12/15

F = (25 + 12)/15

F = 37/15

G = 15/45 + 20/60 - 35/70

G = 15/(3 x 15) + 20/(3 x 20) - 35/(35 x 2)

G = 1/3 + 1/3 - 1/2

G = 2/3 - 1/2

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

G = 4/6 - 3/6

G = 1/6

H = 4/3 - (-6/5)

H = (4 x 5)/(3 x 5) + (6 x 3)/(5 x 3)

H = 20/15 + 18/15

H = (20 + 18)/15

H = 38/15

I = 11/8 + 11/2

I = 11/8 + (11 x 4)/(2 x 4)

I = 11/8 + 44/8

I = (11 + 44)/8

I = 55/8