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D= -25/6 diviser par 5/4

D = -25/6 / (5/4)

D = -25/6 x 4/5

D = (-25 x 4)/(6 x 5)

D = (-5 x 5)/5 x (2 x 2)/(2 x 3)

D = -5 x 2/3

D = -10/3


E= -8/7x-3/4 diviser par 9/16

E = -8/7 x -3/4 / (9/16)

E = 8/7 x 3/4 x 16/9

E = (8 x 3 x 16)/(7 x 4 x 9)

E = (2 x 4 x 3 x 16)/(7 x 4 x 3 x 3)

E = 32/21


F= 12/5+-24/5 diviser par 16/-15

F = 12/5 - 24/5 / (-16/15)

F = 12/5 - 24/5 x (-15/16)

F = 12/5 + (24 x 15)/(5 x 16)

F = 12/5 + (8 x 3 x 3 x 5)/(5 x 2 x 8)

F = 12/5 + 9/2

F = (12 x 2)/(5 x 2) + (9 x 5)/(2 x 5)

F = 24/10 + 45/10

F = 69/10

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