Bonjour besoin d’aide merci d’avance

Réponse ex 1 :

1.

60 = 2 × 2 × 3 × 5

40 = 2 × 2 × 2 × 5

126 = 2 × 3 × 3 × 7

198 = 2 × 3 × 3 × 11

105 = 3 × 5 × 7

90 = 2 × 3 × 3 × 5

2.

60/40 = 3/2

126/198 = 7 /11

105/90 = 7/3x2 = 7/6