bonjour vous pourrez m aider svp ? ​

Bonjour,

1)

10/5 = 2

2/12 = 1/6

-6/15 = -2/5

15/5 +2/5 = 17/5

2)

3/6 + 4/6 = 7/6

-4/10 +3/10 = -1/10

22/36 - 15/36 = 7/36

-9/21 -5/21 = -14/21 = -2/3

3)

8/12 +10/12 + 9/12 = 27/12 = 9/4

6/12 + 10/12 -7/12 = 9/12 = 3/4

- 64/12 - 24/12  +45/12 = -43/12