bjr
2/3 + 7 + 1/3 = 2/3 + 21/7 + 1/3 = 24/3 = 8
ou
2/3 + 1/3 + 7 = 3/3 + 7 = 1 + 7 = 8
4/5 + 2/3 + 1/5 + 4/3 = 5/5 + 6/3 = 1 + 2 = 3
5/4 + 1/+ 7 /4 = 5/4 + 7/4 + 1 = 12/4 + 1 = 3 + 1 = 4
et
5/6 + 1/2 + 1/6 = 5/6 + 1/6 + 1/2 = 6/6 + 1/2 = 1 + 1/2 = 1,5