1/3 + 1/3 =
1/3 + 1/3 = 2/3
3/5 + 1/5 =
3/5 + 1/5 = 4/5
1/10 + 3/10 =
1/10 + 3/10 = 4/10
1/4 + 2/4 =
1/4 + 2/4 = 3/4
4/8 + 1/8 =
4/8 + 1/8 = 5/8
3/7 + 2/7 =
3/7 + 2/7 = 5/7
9/12 + 1/12 =
9/12 + 1/12 = 10/12
7/12 + 2/12 =
7/12 + 2/12 = 9/12
5/10 + 2/10 =
5/10 + 2/10 = 7/10
5/8 + 1/8 =
5/8 + 1/8 = 6/8
2/3 + 1/3 =
2/3 + 1/3 = 3/3