J'ai besoin d'aide svp urgent ! :)

33)
a)
1/3 : 2/5
= 1/3 x 5/2
= 5/6

b)
2/ - 5 : 1/3
= - 2/5 : 1/3
= - 2/5 x 3
= - 6/5

c)
7/4 : - 2/3
= 7/4 x - 3/2
= - 21/8

d)
5/- 2 : - 3/2
= - 5/2 : - 3/2
= - 5/2 x - 2/3
= 10/6
= 2 x 5 / 2 x 3
= 5/3

e)
- 2/7 : - 7/3
= - 2/7 x - 3/7
= 6/49

f)
5/3 : 5/- 2
= 5/3 : - 5/2
= 5/3 x - 2/5
= - 10/15
= 5 x - 2 / 5 x 3
= - 2/3

34)
a)
3/7 : 2
= 3/7 x 1/2
= 3/14

b)
- 2/3 : 5
= - 2/3 x 1/5
= - 2/15

c)
1 : 5/- 7
= 1 : - 5/7
= 1 x - 7/5
= - 7/5

d)
3/4 : 2/11
= 3/4 x 11/2
= 33/8

e)
- 9 : 3/2
= - 9 x 2/3
= - 18/3
= 3 x - 6 / 3 x 1
= - 6

f)
2/13 : 5/13
= 2/13 x 13/5
= 26/65
= 13 x 2 / 13 x 5
= 2/5

33)
1/3 : 2/5 = 1/3*5/2=5/6
2/-5 : 1/3 =2/-5 * 3=-6/5
7/4 : -2/3 = 7/4 * -3/2 =-21/8
5/-2 : -3/2 =5/-2 * -2/3=5/3
-2/7 : -7/3 = -2/7 * -3/7 =6/49
5/3 : 5/-2 = 5/3 * -2/5 = -10/15 = -2/3
34)
3/7:2=3/7 * 1/2=3/14
-2/3 : 5= -2/3 * 1/5 =-2/15
1 : 5/-7 = 1 * -7/5 =-7/5
[tex] \frac{ \frac{3}{4}}{ \frac{2}{11}}[/tex]=3/4 * 11/2 =33/8
[tex] \frac{ -9}{ \frac{3}{2}}[/tex]=-9 * 2/3 =-18/3=-6
[tex] \frac{ \frac{2}{13}}{ \frac{5}{13}}[/tex]=2/13 * 13/5 =2/5