Addition
(1/7) + (4/7)
5/7
(5/8) - (2/8)
3/8
(1/4) x (1/4)
1/16
6/10
22/5
4 and (2/5)
(8/24) + (7/24)
15/24
(17/25) - (8/25)
9/25
(2/6) x (3/6)
6/36
6/36
1/6
19/6
3 and (1/6)
(4/5) + (11/5)
15/5 or 3
(11/6) - (5/6)
6/6 or 1
(3/12) x (7/12)
21/144
5/60
1/12
40/7
5 and (5/7)
(1/3) + (2/9)
5/9
(7/9) - (1/3)
4/9
(1/3) x (5/20)
5/60
132/144
11/12
20/8
2 and (4/8) or 2.5
(1/4) + (2/3)
11/12
(1/3) - (1/4)
1/12
(6/7) x (4/9)
24/63
7/23
Impossible! (Do you know why?)
39/9
4 and (3/9) or 4 and (1/3)