Aidez moi svpp !! simplifier les calculs (resultat attendu en fraction irréductible) ​

Bonjour,

3/5 - 1/3 = (3 * 3)/(5 * 3) - (1 * 5)(3 * 5) = 9/15 - 5/15 = 4/15.

3/20 - 5/15 = (3 * 3)/(20 * 3) - (5 * 4)/(15 * 4) = 9/60 - 20/60 = -11/60.

7/12 + 8/15 + 1/5 = 7/12 + 8/15 + 3/15 = 7/12 + 11/15 = (7 * 15)/(12 * 15) + (11 * 12)/(15 * 12) = 105/180 + 132/180 = 237/180 = (79 * 3)/(60 * 3) = 79/60.

Réponse :

Explications étape par étape