6. Выполните действия: 1 2/5 + 2 3/5; 3 2/7 − 1 1/7; 3/4 · 2/9; 6/5 : 2/15.

1. \(1\frac{2}{5}+2\frac{3}{5}=3\frac{5}{5}=4\).
2. \(3\frac{2}{7}-1\frac{1}{7}=2\frac{1}{7}\).
3. \(\frac{3}{4}\cdot\frac{2}{9}=\frac{6}{36}=\frac{1}{6}\).
4. \(\frac{6}{5}:\frac{2}{15}=\frac{6}{5}\cdot\frac{15}{2}=9\).

Ответ: 4; \(2\frac{1}{7}\); \(\frac{1}{6}\); 9.