Вычисли

• \(-3\dfrac{1}{21}\)
• \(7\dfrac{1}{3} \)
• \(\dfrac{4}{13} \)
• \(-1\dfrac{13}{15} \)
• \(\dfrac{2}{13} \)
• \(7\dfrac{4}{13} \)
• \(-2\dfrac{4}{21} \)

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