Thực hiện phép tính: (a) 2/3 + (-10/6) + (-4/3) (b) 7/3 - 5/6 - 2/3

a) \(\frac{2}{3} + \frac{{ - 10}}{6} + \frac{{ - 4}}{3} = \frac{2}{3} + \frac{{ - 5}}{3} + \frac{{ - 4}}{3} = \frac{{2 - 5 - 4}}{3} = - \frac{7}{3}\)

b) \(\frac{7}{3} - \frac{5}{6} - \frac{2}{3} = \frac{{14 - 5 - 4}}{6} = \frac{5}{6}\);

c) \(\frac{5}{8} - 0,75 + \frac{{15}}{6} = \frac{5}{8} - \frac{3}{4} + \frac{{15}}{6} = \frac{5}{8} - \frac{3}{4} + \frac{5}{2} = \frac{{5 - 6 + 20}}{8} = \frac{{19}}{8}\).