Bonjour pouvez vous m’aider pour lexercise 21,22 et 24 s’il vous plaît

Réponse :

exo 21 :

a et c

exo 22:

c

exo 23 :

A = (4+7)/10 =11/10

B = 14/50 = 7/25

Explications étape par étape

Bonjour,

21)

a. - 7/- 13 = 7/13

c. 4/13 + 3/12 = 7/13.

22)

c) 2/7 x 4/2 = 8/14

24)

A = 2/3 + 5/6

A = (2 x 2) / (3 x 2) + 5/6

A = 4/6 + 5/6

A = 9/6

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

A = 3/2

B = 7/2 + 21/6

B = (7 x 3) / (2 x 3) + 21/6

B = 21/6 + 21/6

B = 42/6

B = (6 x 7) / (6 x 1)

B = 7.

C = 1/12 - 1/3

C = 1/12 - (1 x 4) / (3 x 4)

C = 1/12 - 4/12

C = - 3/12

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

C = - 1/4

D = 2/11 + 4/9

D = (2 x 9) / (11 x 9) + (4 x 11) / (9 x 11)

D = 18/99 + 44/99

D = 62/99