Bonsoir,
a. - 45/36 : 5/- 9
= 45/36 x 9/5
= 405/180
= (45 x 9) / (45 x 4)
= 9/4
b. - 7/5 : 9/50
= - 7/5 x 50/9
= - 350/45
= (5 x - 70) / (5 x 9)
= - 70/9
c. 16/7 : - 12/21
= 16/7 x - 21/12
= - 336/84
= (84 x - 4) / (84 x 1)
= - 4
d. - 3/- 4 : - 5/- 28
= 3/4 x 28/5
= 84/20
= (4 x 21) / (4 x 5)
= 21/5
e. - 11/8 : 33/12
= - 11/8 x 12/33
= - 132/264
= (132 x - 1) / (132 x 2)
= - 1/2
f. 7/2 : (- 3)/4
= 7/2 x - 4/3
= - 28/6
= (2 x - 14) / (2 x 3)
= - 14/3.
