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
☺
