Addition with like denominators
2/8 + 1/8
3/8
3/4 - 2/4
1/4
2/3 + 1/6
5/6
3/10 - 5/20
1/20
7/8 + 5/8
12/8
3/5 - 1/5
2/5
11/12 + 3/4
20/12
2/3 - 1/6
3/6
10/12 + 1/12
11/12
3/7 - 2/7
1/7
3/10 + 5/20
11/20
3/5 - 4/15
5/15
10/13 + 4/13
14/13
5/6 - 3/6
2/6
7/8 + 1/4
9/8
11/12 - 3/4
2/12
4/5 + 6/5
10/5
5/10 - 4/10
1/10
3/5 + 4/15
13/15
7/8 - 1/4
5/8