bonjour
numéro 22
(5/6) ⁻¹ = 6/5
( 3/11) ⁻¹ = 11/3
numéro 23
(3/5) : (7/11) = 3/5 x 11/7 = 33/35
1/7 : 3/2 = 1/7 x 3/2= 3/14
9/5 : 2/13 = 9/5 x 13/2 = 117/10
3 : 5/8 = 3 x 8/5 = 24/5
numéro 24
3/4 : 5/7 = 3/4 x 7/5 = 21/20
3/10 : 1/7 = 3/10 x 7 = 21/10
5/6 : 13/11 = 5/6 x 11/13 = 55/78
5/6 : 3 = 5/6 x 1/3 = 5/18