Réponses

2013-04-28T20:04:18+02:00

A = (3/4)+(2/3) x (2/5 +3/10)

A = (3/4) +(2/3) x (4/10+3/10)

A = (3/4) + (2/3 x 7/10)

A = (3/4) + (14/30)

A = 90/120 + 42/120

A = 132/120 =  33/30

 

B = 9/5 : 3/4

B = 9/5 x 4/3

B = 36/15

Meilleure réponse !
  • Utilisateur Brainly
2013-04-28T20:39:44+02:00

a.

= (3/4)+(2/3) x (2/5 +3/10)

= (3/4) +(2/3) x (4/10+3/10)

= (3/4) + (2/3 x 7/10)

= (3/4) + (14/30)

= 90/120 + 42/120

= 132/120 =  33/30

 

b.

= 9/5 : 3/4

= 9/5 x 4/3

= 36/15

 

voilà..... )