Salut tous le monde j'ai un aniv et j'ai zapper un exo a l'aide ​

Réponse :

Explications étape par étape

Bjr,

N:

140/24 = 70/12 = 35/6

108/42 = 54/21 =18/7

30/36 = 15/18 =5/6

35/6 *18/7 = 630/42 = 315/21 = 105/7=15

5/6 + 15 = 5/6 + 90/6 =95/6

P:

-15/24 = -5/8

35/10 = 7/5

-5/8 +  7/5 = -25/40 + 56/40 = 31/40

(31/40)/(91/24 )= (31*24)/( 40*91) = 744/ 3640 = 372/1820 =

186/910 = 93/455

S:

(10/30 )/(8/28) = (10*28)/(30*8) = 280/240 = 140/120= 14/12 = 7/6

14/30  + 7/6 = 14/30 + 35/30 = 49/30

☺