Odpowiedź:
2 i 1/2 + (3 i 1/2 - 2) = 2 i 1/2 + 1 i 1/2 = 3 i 2/2 = 4
7 i 3/4 - (2 i 1/4 + 2 i 3/4) = 7 i 3/4 - 4 i 4/4 = 7 i 3/4 - 5 = 2 i 3/4
(5 i 3/4 + 4 i 2/4) - (3 i 1/2 + 2 i 1/2) = 9 i 5/4 - 5 i 2/2 = 9 i 5/4 - 6 = 3 i 5/4 = 4 i 1/4
(6 i 1/4 - 2 i 2/4) + (5 i 2/4 - 3 i 3/4) = (5 i 5/4 - 2 i 2/4) + (4 i 6/4 - 3 i 3/4) = 3 i 3/4 + 1 i 3/4 = 4 i 6/4 = 5 i 2/4 = 5 i 1/2
(4 i 7/9 - 3 i 8/9) - 8/9 = (3 i 16/9 - 3 i 8/9) - 8/9 = 8/9 - 8/9 = 0
