bonsoir quelqu'un pourrait m'aider pour mon exercice 6 et 7 page 82 merci ​

Bonjour

6)

a. 2 + 1/4 = (2 x 4) / (1 x 4) + 1/4 = 8/4 + 1/4 = 9/4

b. 7 - 2/3 = (7 x 3) / (1 x 3) - 2/3 = 21/3 - 2/3 = 19/3

c. 1,6 + 8/9 = (1,6 x 9) / (1 x 9) + 8/9 = 14,4/9 + 8/9 = 22,4/9

d. 3 - 25/3 = (3 x 3) / (1 x 3) - 25/3 = 9/3 - 25/3 = - 16/3

7)

a. 4 - 2/7 = (4 x 7) / (1 x 7) - 2/7 = 28/7 - 2/7 = 26/7

b. 5 + 9/4 = (5 x 4) / (1 x 4) + 9/4 = 20/4 + 9/4 = 29/4

c. 19/3 - 5 = 19/3 - (5 x 3) / (1 x 3) = 19/3 - 15/3 = 4/3

d. 6/5 + 2 = 6/5 + (2 x 5) / (1 x 5) = 6/5 + 10/5 = 16/5.

Réponse :

Explications étape par étape

Bonjour

2 + 1/4

= (2 x 4)/4 + 1/4

= 8/4 + 1/4

= 9/4

7 - 2/3

= (7 x 3)/3 - 2/3

= 21/3 - 2/3

= 19/3

1,6 + 8/9

= 16/10 + 8/9

= (2 x 8)/(2 x 5) + 8/9

= 8/5 + 8/9

= (8 x 9)/(5 x 9) + (8 x 5)/(9 x 5)

= 72/45 + 40/45

= 112/45

3 - 25/3

= (3 x 3)/3 - 25/3

= 9/3 - 25/3

= (-16/3)

Exercice :

4 - 2/7

= (4 x 7)/7 - 2/7

= 28/7 - 2/7

= 26/7

5 + 9/4

= (5 x 4)/4 + 9/4

= 20/4 + 9/4

= 29/4

19/3 - 5

= 19/3 - (5 x 3)/3

= 19/3 - 15/3

= 4/3

6/5 + 2

= 6/5 + (2 x 5)/5

= 6/5 + 10/5

= 16/5