A= 3/8 * ( 4/9 + 2/3 ) B= 3/8 * 4/9 + 2/3 C= 7/5 * (3/10 + 1/5 ) D= 7/5 * 3/10 + 1/5 Merci d'avance : )

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

Salut :) 

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

B= 3/8 * 4/9 + 2/3
B= [tex] \frac{5}{6} [/tex]

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

D= 7/5 * 3/10 + 1/5
D= [tex] \frac{31}{50} [/tex]