Réponses

Meilleure réponse !
2014-05-10T16:18:47+02:00
Bonjour

A= 3/8 * ( 4/9 + 2/3 )
A = 3/8  x ( 4/9 + 6/9)
A = 3/8 x 10/9
A = 30/72  = 5/12

B= 3/8 * 4/9 + 2/3
B = 12/72 + 2/3
B = 12/72 + 48/72
B = 60/72 = 5/6

C= 7/5 * (3/10 + 1/5 )
C = 7/5 x ( 3/10 + 2/10)
C = 7/5 x 5/10
C = 35/50 = 7/10

 D= 7/5 * 3/10 + 1/5
D = 21/50 + 1/5
D = 21/50 + 10/50
D = 31/50

moi je comprend pas pk tu t appeler " NULLASSE" pck franchement c pas le ka
2014-05-10T16:21:06+02:00
Salut :) 

A= 3/8 * ( 4/9 + 2/3 )
A=  \frac{5}{12}

B= 3/8 * 4/9 + 2/3
B=  \frac{5}{6}

C= 7/5 * (3/10 + 1/5 )
C=  \frac{7}{10}

D= 7/5 * 3/10 + 1/5
D=  \frac{31}{50}