je suis en 3è. et je dois calculer et simplifier si possible A=-2 : 3 + 2 --- --- --- 5 15 15 B = 9 - 5 : 15 ---- ---- ---- 2

Bonjour,

A = - 2/5 : 3/15 + 2/15

A = - 2/5 x 15/3 + 2/15

A = - 30/15 + 2/15

A = - 28/15

B = 9/2 - 5/2 : 15/8

B = 9/2 - 5/2 x 8/15

B = 9/2 - 40/30

B = (9 x 15) / (2 x 15) - 40/30

B = 135/30 - 40/30

B = 95/30

B = (5 x 19) / (5 x 6)

B = 19/6.

Réponse :

Explications étape par étape

Bonjour

calculer et simplifier si possible

A = -2/5 : 3/15 + 2/15

A = -2/5 x 15/3 + 2/15

A = -15/5 x 2/3 + 2/15

A = -3 x 2/3 + 2/15

A = -2 + 2/15

A = -30/15 + 2/15

A = -28/15

B = 9/2 - 5/2 : 15/8

B = 9/2 - 5/2 x 8/15

B = 9/2 - 5/15 x 8/2

B = 9/2 - 1/3 x 4

B = 9/2 - 4/3

B = 27/6 - 8/6

B = 19/6