1/3 + 2/5= 3/4 – 1/6= 1-2/8= [1/3 + 2/3]- 2/12=

1/3 + 2/5= 11/15
3/4 – 1/6=7/12
1-2/8= 6/8
[1/3 + 2/3]- 2/12= 1 – 2/12 = 10/12 = 5/6

1/3 + 2/5 = 5/15 + 6/15 = 11/15
8/8 - 2/8 = 6/8 = 3/4
[1/3 + 2/3] – 2/12 = 1 - 2/12 = 10/12 = 5/6