bonsoir pouvez-vous m'aider aux deux exercices svp merci​

Bonsoir,

a. 78/36 : 13/72

= 78/36 x 72/13

= 5616/468

= (468 x 12) / (468 x 1)

= 12

b. 54/74 : 36/37

= 54/74 x 37/36

= 1998/2664

= (666 x 3) / (666 x 4)

= 3/4

c. 125/81 : 75/108

= 125/81 x 108/75

= 13500/6075

= (675 x 20) / (675 x 9)

= 20/9

80)

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