5/6 multiplier par 2/3 5/6 additionner 2/3 5/6 soustraire 2/3

5/6 x 2/3 = 10/18 = 5/9
5/6 + 2/3 = 5/6 = 4/6 = 9/6 = 3/2
5/6 - 2/3 = 5/6 - 4/6 = 1/6