Bonsoir
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
