Ответ: -3,875

[tex]2 \frac{3}{4} - 1 \frac{1}{2} + ( - \frac{5}{6} ) - ( - \frac{3}{8} ) - 4 \frac{2}{3} = \frac{11}{4} - \frac{3}{2} - \frac{5}{6} + \frac{3}{8} - \frac{14}{3} = \frac{66 - 36 - 20 + 9 - 112}{24} = - \frac{93}{24} = - 3.875[/tex]