1. Заполните пропуски: 8 2/7 + 5 3/14; 5 7/8 + 2 5/12; 7 3/8 + 1 5/8; 1 1/9 + 2 3/5; 7 2/9 + 4; 7 + 3 5/8; 8 3/5 + 1/15; 2/3 + 4 3/5.

Приводим дробные части к общему знаменателю и складываем целые и дробные части.

1. \(8\frac{2}{7}+5\frac{3}{14}=8+\frac{4}{14}+5+\frac{3}{14}=13\frac{7}{14}=13\frac{1}{2}\).
2. \(5\frac{7}{8}+2\frac{5}{12}=7+\frac{21}{24}+\frac{10}{24}=7+\frac{31}{24}=8\frac{7}{24}\).
3. \(7\frac{3}{8}+1\frac{5}{8}=8+\frac{9}{8}+\frac{20}{8}=8\frac{29}{8}=9\frac{5}{8}\).
4. \(1\frac{1}{9}+2\frac{3}{5}=3+\frac{5}{45}+\frac{27}{45}=3\frac{32}{45}\).
5. \(7\frac{2}{9}+4=11\frac{2}{9}\).
6. \(7+3\frac{5}{8}=10\frac{5}{8}\).
7. \(8\frac{3}{5}+\frac{1}{15}=8+\frac{9}{15}+\frac{1}{15}=8\frac{10}{15}=8\frac{2}{3}\).
8. \(\frac{2}{3}+4\frac{3}{5}=4+\frac{10}{15}+\frac{9}{15}=4\frac{19}{15}=5\frac{4}{15}\).