Réponses

  • Utilisateur Brainly
2014-06-17T17:39:28+02:00
A) 20/14 = 10/7 = 40/28

b) 72/48 = 12/8 = 36/24

c) 40/64 = 5/8 = 20/32 = t'es sur 15/
2014-06-17T17:47:21+02:00
A) 20/14=(10×2)/(7×2)=10/7=(10×4)/(7×4)=40/28  
as tu compris le principe ?

b) 72/48= (6×12)/(4×12)=6/4= (6×2)/(4×2)= 12/8= (12×3)/(8×3)=36/24
c) 40/64 =( 5×8)/ (8×8) = 5/8 = (4×5)/(4×8)=20/32 = 15/24
Merci beaucoup !
de rien , si tu as compris c'est le principal