Odpowiedź:
zad 1
2 - 2/9 = 1 i 9/9 - 2/9 = 1 i 7/9
2 i 1/7 - 2/7 = 1 i 8/7 - 2/7 = 1 i 6/7
zad 2
2 i 3/10 - 2/5 = 2 i 3/10 - 4/10 = 1 i 13/10 - 4/10 = 1 i 9/10 F
2/3 + 1 i 1/8 = 16/24 + 1 i 3/24 = 1 i 19/24
3 i 1/6 - 1 i 9/24 = 3 i 4/24 - 1 i 9/24 = 2 i 28/24 - 1 i 9/24 = 1 i 19/24 P
zad 3
3 i 2/15 - 5/6 = 3 i 4/30 - 25/30 = 2 i 34/30 - 25/30 = 2 i 34/30 - 25/30 = 2 i 9/30 ODP A
2 i 9/35 - 1 i 5/14 = 2 i 18/70 - 1 i 25/70 = 1 i 88/70 - 1 i 25/70 = 63/70 = 9/10 ODP D
zad 4
2 i 5/21 - 4/7 = 2 i 5/21 - 12/21 = 1 i 26/21 - 12/21 = 1 i 14/21 = 1 i 2/3
4 i 1/6 - 1 i 1/4 = 4 i 2/12 - 1 i 3/12 = 3 i 14/12 - 1 i 3/12 = 2 i 11/12
