Adding
1/4 + 2/4
3/4
3/4 - 1/4
2/4 or 1/2
1/3 = ?/6
2/6
1 1/3 + 1 1/3
2 2/3
2 and 5
10
3/9 + 3/9
6/9 or 2/3
16/23 - 7/23
9/23
4/12 = 1/?
1/3
3 2/3 + 4 1/3
7 3/3 or 8
2 and 9
18
11/88 + 22/88
33/88 or 3/8
343/227 - 211/227
132/227
20/25 = 4/?
4/5
6 3/4 - 2 1/4
4 2/4 or 4 1/2
10 and 6
30
1/4 + 1/5
9/20
2/3 - 1/2
1/6
110/140 = ?/14
11/14
5 1/3 - 2 1/6
3 1/6
8 and 10
40
3/8 + 1/3
20/24 or 10/12 or 5/6
7/8 - 1/3
13/24
?/100 = 1/5
20/100
2 3/4 + 1 2/3
3 17/12 or 4 5/12
16 and 6
48