Возник вопрос. Вычислить наиболее удобным способом:
а) 4 2/3+1 1/3•3-9 1/6;
б) 13/15-2 1/4•4+2•2 2/5;
в) 2 3/4+(3 1/5-3 7/10)•1 1/4

а) 4(2/3) + 1(1/3) * 3 – 9(1/6) = (14/3) + 4 – (37/6) = (28 – 37)/6 + 4 = -9/6 + 4 = -1,5 + 4 = 2,5.
б) (13/15) – 2(1/4) * 4 + 2 * 2(2/5) = (13/15) – 9 + (24/5) = (13 + 72)/15 – 9 = 85/15 – 9 = 17/3 – 27/3 = -10/3 = -3(1/3) ;
в) 2(3/4) + (3(1/5) – 3(7/10)) * 1(1/4) = (11/4) + (32/10 – 37/10) * 5/4 = (11/4) – (5/10) * (5/4) = (11/4) – (25/40) = (110 – 25)/40 = 85/40 = 2,125.