Bonjour vous pouvez m’aider svp merci

Réponse :

Explications étape par étape

Bjr,

A)

3/2- 1/3 = 9/6- 2/6 = 7/6

3/4 +2/3 = 9/12 + 8/12 = 17/12

(7/6) /(17/12) = (7*12)/6*17) = 84/102 = 42/51 =14/34

B)

(2/7)/(5/14) = (2*14)/(7*5)= 28/ 35 = 4/5

2+4/5 = 10/5 + 4/5 = 14/5

C)

3/(7/5) = (3*5)/7 =15/7

-3/14 - 15/7 +2 =

-3/14 -30/14 + 28/14 = -5/14

D)

(8/15)/(2/3) =(8*3)/(15*2) = 24/30 = 12/15 = 4/5

7/5 +4/5 -19/2 =

14/10 +8/10 - 95/10= -73/10

☺

Explications étape par étape

A = 3/2 - 1/3 : 3/4 + 2/3

= 9/6 - 2/6 : 9/12 + 8/12

= 7/6 : 9/12

= 7/6 x 12/9

= 84/54

= 14/9

B = 2 + 2/7 : 5/14

= 2 + 2/7 x 14/5

= 2 + 28/35

= 70/35 + 28/35

= 98/35

= 14/5

C = - 3/14 - 3 : 7/5 + 2

= - 3/14 - 3 x 5/7 + 28/14

= 25/14 - 15/7

= 25/14 - 30/14

= - 5/14

D = 7/5 + 8/15 : 2/3 - 19/2

= 14/10 - 95/10 + 8/15 x 3/2

= - 81/10 + 24/30

= - 81/10 + 8/10

= - 73/10