Bonjour il y a un exercice auquel je ne comprend pas, merci au personne qui vont y répondre. C=2sur3 + 1sur6 x 3sur2 D= (1sur9 + 1sur3) ÷ 2sur15 E= -3sur4 x 1

Réponse :

Bonjour,

C = 2/3 + 1/6 x 3/2 = 2/3 + 3/6 x 1/2 = 2/3 + 1/2 x 1/2 = 2/3 + 1/4 = 8/12 + 3/12

= 11/12

D = (1/9  + 1/3) : 2/15 = (1/9 + 3/9) x 15/2 = 4/(3x3) x 3 x 5/2 = 4/3 x 5/2 = 10/3

E = -3/4 x 1/2 - 1/3 : 4/3 = -3/4 x 1/2 - 1/3 x 3/4 = -3/4 (1/2+1/3) = -3/4 (3/6 + 2/6)

= -3/4 x 5/6 = -5/8

F = (1/4 - 1/3) x (3/4 - 3/2) = (3/12 - 4/12) x ( 3/4 - 6/4) = -1/12 x (-3/4) = 1/16

Réponse :

Explications étape par étape

Bonsoir

C=2sur3 + 1sur6 x 3sur2

C = 2/3 + 1/6 x 3/2

C = 2/3 + 3/6 x 1/2

C = 2/3 + 1/2 x 1/2

C = 2/3 + 1/4

C = 8/12 + 3/12

C = 11/12

D= (1sur9 + 1sur3) ÷ 2sur15

D = (1/9 + 1/3) / (2/15)

D = (1/9 + 3/9) x 15/2

D = 4/9 x 15/2

D = 15/9 x 4/2

D = 5/3 x 2

D = 10/3

E= -3sur4 x 1sur2 - 1sur3 ÷ 4sur3

E = -3/4 x 1/2 - 1/3 / (4/3)

E = -3/8 - 1/3 x 3/4

E = -3/8 - 1/4

E = -3/8 - 2/8

E = -5/8

F=(1sur4 - 1sur3) x (3sur4 - 3sur2)

F = (1/4 - 1/3) x (3/4 - 3/2)

F = (3/12 - 4/12) x (3/4 - 6/4)

F = (-1/12) x (-3/4)

F = 3/12 x 1/4

F = 1/4 x 1/4

F = 1/16