Bonjour
A = 2/3 + 5/6
A = (2 x 2)/(3 x 2) + 5/6
A = 4/6 + 5/6
A = 9/6
A = (3 x 3)/(2 x 3)
A = 3/2
B = 7/2 - 2/3
B = (7 x 3)/(2 x 3) - (2 x 2)/(3 x 2)
B = 21/6 - 4/6
B = 17/6
C = 7/3 x 5/4 + 1/6
C = 35/12 + (1 x 2)/(6 x 2)
C = 35/12 + 2/12
C = 37/12
D = 15/9 x 12/25 - 7/4
D = (15 x 12)/(9 x 25) - 7/4
D = (3 x 5 x 3 x 4)/(3 x 3 x 5 x 5) - 7/4
D = 4/5 - 7/4
D = (4 x 4)/(5 x 4) - (7 x 5)/(4 x 5)
D = 16/20 - 35/20
D = -19/20
E = 9/28 x 7/5 + 10/3 x 6/25
E = (9 x 7)/(28 x 5) + (10 x 6)/(3 x 25)
E = (9 x 7)/(7 x 4 x 5) + (2 x 5 x 2 x 3)/(3 x 5 x 5)
E = 9/20 + 4/5
E = 9/20 + (4 x 4)/(5 x 4)
E = 9/20 + 16/20
E = 25/20
E = (5 x 5)/(5 x 4)
E = 5/4
F = (7/3 - 5) x 2/5
F = [7/3 - (5 x 3)/3] x 2/5
F = (7/3 - 15/3) x 2/5
F = (-8/3) x 2/5
F = (-16/15)
