ж) (15$$\frac{1}{2}$$ - 2$$\frac{3}{8}$$) - (5$$\frac{5}{6}$$ + 6$$\frac{3}{4}$$);

ж) (15$$\frac{1}{2}$$ - 2$$\frac{3}{8}$$) - (5$$\frac{5}{6}$$ + 6$$\frac{3}{4}$$) = (15$$\frac{4}{8}$$ - 2$$\frac{3}{8}$$) - (5$$\frac{10}{12}$$ + 6$$\frac{9}{12}$$) = 13$$\frac{1}{8}$$ - 11$$\frac{19}{12}$$ = 13$$\frac{3}{24}$$ - 11$$\frac{38}{24}$$ = 2$$\frac{3}{24}$$ - $$\frac{38}{24}$$ = 1$$\frac{27}{24}$$ - $$\frac{38}{24}$$ = $$\frac{51}{24}$$ - $$\frac{38}{24}$$ = $$\frac{13}{24}$$

Ответ: $$\frac{13}{24}$$