Odpowiedź:
6 i 1/4 + 5 i 2/3 = 6 i 3/12 + 5 i 8/12 = 11 i 11/12
4 i 3/5 - 2 i 1/7 = 4 i 21/35 - 2 i 5/35 = 2 i 16/35
3/8 + 1/3 = 9/24 + 8/24 = 17/24
2/3 + 1/5 = 10/15 + 3/15 = 13/15
2 i 2/9 + 3 i 1/2 = 2 i 4/18 + 3 i 9/18 = 5 i 13/18
4 i 2/7 + 2 i 1/3 = 4 i 6/21 + 2 i 7/21 = 6 i 13/21
4/7 - 2/5 = 20/35 - 14/35 = 6/35
6/7 - 1/3 = 18/21 - 7/21 = 11/21
5 i 3/5 - 2 i 1/3 = 5 i 9/15 - 2 i 5/15 = 3 i 4/15
7 i 7/8 - 2 i 1/5 = 7 i 35/40 - 2 i 8/40 = 5 i 27/40
