Odpowiedź:
(1,2 + 1/25) : 0,4 - (1,75 - 5/4) * 2/3 = (1 i 2/10 + 1/25) : 4/10 - (1 i 3/4 - 5/4) * 2/3 = (1 i 10/50 + 2/50) : 4/10 - (7/4 - 5/4) * 2/3 = 1 i 12/50 : 4/10 - 2/4 * 2/3 = 62/50 * 10/4 - 4/12 = 31/10 - 4/12 = 186/60 - 20/60 = 166/60 = 2 i 46/60 = 2 i 23/30