Odpowiedź:
3 i 5/8 + 1 i 3/4 + 2 i 1/2 = 3 i 5/8 + 1 i 6/8 + 2 i 4/8 = 6 i 15/8 = 7 i 7/8
4 i 1/6 - 1 i 3/5 + 2 i 1/2 = 4 i 5/30 - 1 i 18/30 + 2 i 15/30 = 3 i 35/30 - 1 i 18/30 + 2 i 15/30 = 2 i 17/30 + 2 i 15/30 = 4 i 32/30 = 5 i 2/30 = 5 i 1/15
4 i 1/2 - 2 i 3/5 - 1 i 2/3 = 4 i 15/30 - 2 i 18/30 - 1 i 20/30 = 3 i 45/30 - 2 i 18/30 - 1 i 20/30 = 1 i 27/30 - 1 i 20/30 = 7/30