Pouvais vous m'aide pour les fraction merci

11/4 + 5/6
= 11 x 6 / 4 x 6 + 5 x 4 / 6 x 4
= 66/24 + 20/24
= 88/24
= 8 x 11 / 8 x 3
= 11/3

10/9 + 6/7
= 10 x 7 / 9 x 7 + 6 x 9 / 7 x 9
= 70/63 + 54/63
= 124/63

7/8 + 3/8 = 10/8 = 2 x 5 / 2 x 4 = 5/4

9/16 + 11/16 = 20/16 = 4 x 5 / 4 x 4 = 5/4

11/18 - 4/9 = 11/18 - 4 x 2 / 9 x 2 = 11/18 - 8/18 = 3 x 1 / 3 x 6 = 1/6

9/8 - 3/5
= 9 x 5 / 8 x 5 - 3 x 8 / 5 x 8
= 45/40 - 24/40
= 21/40

9/14 - 11/14 = - 2/14 = 2 x - 1 / 2 x 7 = - 1/7

5/6 - 1/6 = 4/6 = 2 x 2 / 2 x 3 = 2/3

11/18 x 4/9 = 44/162 = 2 x 22 / 2 x 81 = 22/81

10/3 x 8/5 = 80/15 = 5 x 16 / 5 x 3 = 16/3

5/12 x 3/5 = 15/60 = 15 x 1 / 15 x 4 = 1/4

7/8 x 3/8 = 21/64

4/7 : 3/8 = 4/7 x 8/3 = 32/21

10/3 : 8/5 = 10/3 x 5/8 = 50/24 = 2 x 25 / 2 x 12 = 25/12

7/3 : 4/3 = 7/3 x 3/4 = 21/12 = 3 x 7 / 3 x 4 = 7/4

7/20 : 3/20 = 7/20 x 20/3 = 140/60 = 20 x 7 / 20 x 3 = 7/3

(1/2 + 3/4) + (5/6 x 7/8)
= (1 x 2 / 2 x 2 + 3/4) + (35/48)
= (2/4 + 3/4) + 35/48
= 5/4 + 35/48
= 5 x 12 / 4 x 12 + 35/48
= 60/48 + 35/48
= 95/48

3 x 5/9 = 15/9 = 3 x 5 / 3 x 3 = 5/3

9/4 + 3/4 x 5/2 = 9/4 + 15/8 = 9 x 2 / 4 x 2 + 15/8 = 18/8 + 15/8 = 33/8