Bonjour
A = 7/3 - 4/3 : 8/5
A = 7/3 - 4/3 x 5/8
A = 7/3 - 20/24
A = (7 x 2) / (3 x 2) - (4 x 5) / (4 x 6)
A = 14/6 - 5/6
A = 9/6
A = (3 x 3) / (3 x 2)
A = 3/2
B = - 4/9 x 1/5 : 3/7
B = - 4/45 x 7/3
B = - 28/135
C = - 8/3 : - 5/6 + 7/4
C = - 8/3 x (- 6/5) + 7/4
C = 48/15 + 7/4
C = (48 x 4) / (15 x 4) + (7 x 15) / (4 x 15)
C = 192/60 + 105/60
C = 297/60
C = (3 x 99) / (3 x 20)
C = 99/20
D = - 7/5 : (2/9 - 7/18)
D = - 7/5 : [(2 x 2) / (9 x 2) - 7/18]
D = - 7/5 : (4/18 - 7/18)
D = - 7/5 : (- 3/18)
D = - 7/5 x (- 18/3)
D = 126/15
D = (3 x 42) / (3 x 5)
D = 42/5
E = (4/5 + -3/2) : (- 9/4 - 1/6)
E = [(4 x 2) / (5 x 2) - (3 x 5) / (2 x 5)] : [(- 9 x 3) / (4 x 3) - (1 x 2) / (6 x 2)]
E = (8/10 - 15/10) : (- 27/12 - 2/12)
E = (- 7/10) : (- 27/12)
E = (- 7/10) x (- 12/27)
E = 84/270
E = (6 x 14) / (6 x 45)
E = 14/45.
