bonjour

5/6 - 1 /3 = 5/6 - 2/6 = 3 /6

1/9  + 1 /27 = 3/27 + 1/27 = 4 /27

- 8/5 + 23/50  = - 80/50 + 23 /50 = - 57/50

45/15 - 7/3 = 45/15 - 35/15 = 10/15 = 2 /3

Salut ☺️,

alors :

a.

-1 × 2 = -2

3 × 2 = 6

5/6 + -2/6 = 3/6

3/6 = 1/2

b.

7 × 3 = 21

9 × -3 = -27

21/26

21/-27 - 1/-27 = 20/-27

c.

8 × 10 = 80

5 × 10 = 50

80/50 + 23/50 = 103/50

d.

45÷ 5 = 9

15 ÷ 5 = 3

9/3 - 7/3 = 2/3

Voila, j'espère t'avoir aidé,

passe une bonne journée !!!