Bjr pourriez vous m’aidez svp je suis en pleurs je n’arrive pas du tout depuis hier svp aidez moi !.

Réponse :

Explications étape par étape

Bonjour

A = 1/3 + 1/3

A = 2/3

B = 2/3 + 5/12

B = (2 x 4)/(3 x 4) + 5/12

B = 8/12 + 5/12

B = 13/12

C = 8 - 13/2

C = 16/2 - 13/2

C = 3/2

D = 3/2 + 5/12

D = (3 x 6)/(2 x 6) + 5/12

D = 18/12 + 5/12

D = 23/12

E = 9/20 - 1/4

E = 9/20 - (1 x 5)/(4 x 5)

E = 9/20 - 5/20

E = 4/20

E = 1/5

F = 13/6 + 7/12

F = (13 x 2)/(6 x 2) + 7/12

F = 26/12 + 7/12

F = 33/12

G = 23/6 - 2/3

G = 23/6 - (2 x 2)/(3 x 2)

G = 23/6 - 4/6

G = 19/6

H = 23/100 + 3/20

H = 23/100 + (3 x 5)/(20 x 5)

H = 23/100 + 15/100

H = 38/100

H = 19/50

I = 41/9 - 5/9

I = 36/9

I = 4

J = 11/8 - 33/24

J = (11 x 3)/(8 x 3) - 33/24

J = 33/24 - 33/24

J = 0

K = 4/3 - 13/21

K = (4 x 7)/(3 x 7) - 13/21

K = 28/21 - 13/21

K = 15/21

K = 5/7

L = 9/2 + 7/16

L = (9 x 8)/(2 x 8) + 7/16

L = 72/16 + 7/16

L = 79/16

M = 27/13 - 1/13

M = 26/13

M = 2

N = 3 + 46/3

N = 9/3 + 46/3

N = 55/3

O = 18/11 - 12/11

O = 6/11

Relier les points : voir pièce jointe

Exercice :

1/20 : natation

3/4 : vélo

? : course à pied

J’imagine qu’il faut déterminer la proportion du parcours pour la course à pied ?

1/20 + 3/4 = 1/20 + (3 x 5)/(4 x 5) = 15/20

Il reste pour la course :

1 - 15/20 = 20/20 - 15/20 = 5/20 = 1/4