6) $$9 \frac{2}{5} - (-1 \frac{1}{5}) = $$ $$-6 \frac{4}{5} + 2 \frac{2}{5} = $$ $$11 \frac{3}{13} - 14 \frac{9}{13} = $$ $$7 \frac{1}{3} - 9 \frac{1}{4} = $$

Решение:

1. \( 9 \frac{2}{5} - (-1 \frac{1}{5}) = 9 \frac{2}{5} + 1 \frac{1}{5} = 10 \frac{3}{5} \)
2. \( -6 \frac{4}{5} + 2 \frac{2}{5} = -6 \frac{4}{5} + \frac{12}{5} = - \frac{34}{5} + \frac{12}{5} = - \frac{22}{5} = -4 \frac{2}{5} \)
3. \( 11 \frac{3}{13} - 14 \frac{9}{13} = \frac{146}{13} - \frac{191}{13} = \frac{146 - 191}{13} = - \frac{45}{13} = -3 \frac{6}{13} \)
4. \( 7 \frac{1}{3} - 9 \frac{1}{4} = \frac{22}{3} - \frac{37}{4} = \frac{88}{12} - \frac{111}{12} = \frac{88 - 111}{12} = - \frac{23}{12} = -1 \frac{11}{12} \)

Ответ: $$10 \frac{3}{5}$$; $$-4 \frac{2}{5}$$; $$-3 \frac{6}{13}$$; $$-1 \frac{11}{12}$$.