Bonjour
1/2 + 1/4 = (1 x 2)/(2 x 2) + 1/4 = 2/4 + 1/4 = (2 + 1)/4 = 3/4
5/6 + 5/12 = (5 x 2)/(6 x 2) + 5/12 = 10/12 + 5/12 = (10 + 5)/12 = 15/12 = (3 x 5)/(3 x 4) = 5/4
13/14 + 5/7 = 13/14 + (5 x 2)/(7 x 2) = 13/14 + 10/14 = (13 + 10)/14 = 23/14
3/4 + 5/24 = (3 x 6)/(4 x 6) + 5/24 = 18/24 + 5/24 = (18 + 5)/24 = 23/24
6/7 + 2/35 = (6 x 5)/(7 x 5) + 2/35 = 30/35 + 2/35 = 32/35
11/81 + 1/9 = 11/81 + (1 x 9)/(9 x 9) = 1/81 + 9/81 = 10/81
