Réponse :
Explications :
Exercice 2
4/15 = 8/30 4/9 = 12/27 3/21 = 1/7 40/72 = 5/9
Exercice 3
1. 18/14 = 2x9/2x7 = 9/7 24/34 = 2x12/2x17 = 12/17
2. 27/33 = 3x9/3x11 = 9/11 24/21 = 3x8/3x7 = 8/7
3. 25/40 = 5x5/5x8 = 5/8 28/35 = 7x4/7x5 = 4/5
Voilà j'espère que cela t'aura aider et que c'est juste.
