Odpowiedź:
1 i 1/4 - 1/2 = 1 i 1/4 - 2/4 = 5/4 - 2/4 = 3/4
1 i 4/9 - 2/3 = 1 i 4/9 - 6/9 = 13/9 - 6/9 = 7/9
