Помогите! ж) и з) даю 10 баллов!

Ж) $(15 \frac{1}{2} - 2 \frac{3}{8}) - (5 \frac{5}{6}+6 \frac{3}{4}) + (10 \frac{2}{3}-5 \frac{5}{8})$ = $15 \frac{1}{2} - 2 \frac{3}{8} - 5 \frac{5}{6} - 6 \frac{3}{4} + 10 \frac{2}{3}-5 \frac{5}{8} = 7 \frac{12-9-20-18+16-15}{24} = 7 \frac{-34}{24} = 6 \frac{-10}{24}$ = $5 \frac{14}{24} = 5 \frac{7}{12}$

з) $(20 - 19 \frac{3}{4}) + (17 \frac{3}{4} - 17) + (2 \frac{1}{2} - \frac{17}{24}) = \frac{1}{4} + \frac{3}{4} + \frac{5}{2} - \frac{17}{24} =$ $1 + \frac{60-17}{24} = 1 \frac{43}{24} = 2 \frac{19}{24}$