Odpowiedź:
o) 3 i 1/15 - 1 i 1/10 = 3 i 2/30 - 1 i 3/30 = 2 i 32/30 - 1 i 3/30 = 1 i 29/30
p) 5 i 5/13 - 3 i 1/2 = 5 i 10/26 - 3 i 13/26 = 4 i 36/26 - 3 i 13/26 = 1 i 23/26
