Odpowiedź:
7/9 + 4/5 = 35/45 + 36/45 = 71/45 = 1 i 26/45
4/5 + 5/8 = 32/40 + 25/40 = 57/40 = 1 i 17/40
5/7 - 1/6 = 30/42 - 7/42 = 23/42
2/3 - 1/10 = 20/30 - 3/30 = 17/30
1/6 + 6/7 = 7/42 + 36/42 - 43/42 = 1 i 1/42
3/4 + 4/5 = 15/20 + 16/20 = 31/20 = 1 i 11/20
5/6 + 5/7 = 35/42 + 30/42 = 65/42 = 1 i 23/42
10/11 - 1/2 = 20/22 - 11/22 = 9/22
2/3 - 2/7 = 14/21 - 6/21 = 8/21
3/10 + 8/15 = 9/30 + 16/30 = 25/30 = 5/6
5/6 - 4/9 = 15/18 - 8/18 = 7/18
3/8 + 5/12 = 9/24 + 10/24 = 19/24
7/12 - 4/15 = 35/60 - 16/60 = 19/60
5/9 + 7/12 = 20/36 + 21/36 = 41/26 = 1 i 15/36 = 1 i 5/12
8/9 - 7/15 = 40/45 - 21/45 = 19/45
1/6 + 5/8 = 4/24 + 15/24 = 19/24
17/20 - 8/15 = 51/60 - 32/60 = 19/60
11/18 - 5/12 = 22/36 - 15/36 = 7/36
