Réponse :
Explications étape par étape
Bonjour
Calculer en simplifiant si possible et vérifier avec la calculatrice.
C=(4/5-11/3)x25/43.
C = [(4 x 3)/(5 x 3) - (11 x 5)/(3 x 5)] x 25/43
C = (12/15 - 55/15) x 25/43
C = (-43/15) x 25/43
C = 43/43 x -25/15
C = -(5 x 5)/(5 x 3)
C = -5/3
D= -2/5:3/15+2/15
D = (-2/5) x 15/3 + 2/15
D = -15/5 x 2/3 + 2/15
D = -(5 x 3)/5 x 2/3 + 2/15
D = -3 x 2/3 + 2/15
D = 3/3 x (-2) + 2/15
D = -(2 x 15)/15 + 2/15
D = -30/15 + 2/15
D = -28/15
