Найди значения выражений

• \(10\dfrac{4}{15}\)
• \(2\dfrac{2}{3} \)
• \(2\dfrac{1}{13} \)
• \(2\dfrac{5}{6} \)
• \(2\dfrac{2}{13} \)
• \(10\dfrac{2}{10} \)

1. \(2\dfrac{1}{7}+6\dfrac{4}{15}+1\dfrac{6}{7}=\) [ ]
2. \(9\dfrac{3}{5}-4\dfrac{3}{5}-2\dfrac{1}{3}=\) [ ]
3. \(5\dfrac{7}{8}+1\dfrac{5}{6}-4\dfrac{7}{8}=\) [ ]
4. \(1\dfrac{2}{13}+2\dfrac{5}{9}-1\dfrac{5}{9}=\) [ ]