Bonjour vous pouvez m'aidez c'est pour Lundi svp, Calculer et simplifier au maximum : A = 8/12 - 6/12 B = 5/4 + 1/1 C = 16/21 - 1/3 D = 7/6 + 8/9 E = 5/12 + 11/

Réponse :

bonjour

A =  8/12 - 6 /12 =  2/12 = 1 /6

B = 5/4 + 4/4 = 9 /4

C = 16/21 - 7/21 = 9 /21  = 3 / 7

D = 21/18 + 16/18 = 37/18

E = 10/24 + 11 /24 + 4/24 = 25/24

F = 4 - ( 27/30 - 22/30 )

F =  4 - 5 /30

F = 4 - 1 /6

F = 24/6 - 1 /6 = 23 /6

Explications étape par étape :

Bonjour,

A = 8/12 - 6/12

= 2/12

= 1/6

B = 5/4 + 1/1

= 5/4 + 4/4

= 9/4

C = 16/21 - 1/3

= 16/21 - 7/21

= 9/21

= 3/7

D = 7/6 + 8/9

21/18 + 16/18

= 37/18

E = 5/12 + 11/24 + 1/6

= 10/24+ 11/24 +4/24

= 25/24

F = 4 - (9/10 - 11/15)

= 4- 9/10 +11/15

= 120/30 - 27/30+22/30

= 115/30

= 23/6