Bonjour
A = 5/6 + 1/2 = 5/6 + (1 x 3) / (2 x 3) = 5/6 + 3/6 = 8/6 = (2 x 4) / (2 x 3) = 4/3
B = 3/5 + 7/10 = (3 x 2) / (5 x 2) + 7/10 = 6/10 + 7/10 = 13/10
C = 8/3 + 1 = 8/3 + (1 x 3) / (1 x 3) = 8/3 + 3/3 = 11/3
D = 4 + 3/4 = (4 x 4) / (1 x 4) + 3/4 = 16/4 + 3/4 = 19/4
E = 5/9 - 2/3 = 5/9 - (2 x 3) / (3 x 3) = 5/9 - 6/9 = - 1/9
F = 7/6 - 13/30 = (7 x 5) / (6 x 5) - 13/30 = 35/30 - 13/30 = 22/30 = (2 x 11) / (2 x 15) = 11/15.
G = 2 - 4/7 = (2 x 7) / (1 x 7) - 4/7 = 14/7 - 4/7 = 10/7
H = 8/9 - 5 = 8/9 - (5 x 9) / (1 x 9) = 8/9 - 45/9 = - 37/9.
