Bonjour
1) 1/3 + 1/4 + 3/5
= (1 x 20) / (3 x 20) + (1 x 15) / (4 x 15) + (3 x 12) / (5 x 12)
= 20/60 + 15/60 + 36/60
= 71/60
Impossible il y a trop d'ingrédient ! 71/60 > 60/60.
2) 1 - (1/2 + 1/5)
= (1 x 10) / (1 x 10) - [(1 x5) / (2 x 5) + (1 x 2) / (5 x 2)]
= 10/10 - (5/10 + 2/10)
= 10/10 - 7/10
= 3/10
Le cocktail Fidgi contient 3/10 de jus d'ananas.