Найдите значение выражения (2,5-2 1/3)×(-5 1/7)+1 1/3÷(-5,6)

Решите задачу:

$1)2 \frac{1}{2} - 2 \frac{1}{3} = 2 \frac{3}{6} - 2 \frac{2}{6} = \frac{1}{6}$
$2) \frac{1}{6} \times ( - 5 \frac{1}{7} ) = - \frac{1}{6} \times \frac{36}{7} = - \frac{6}{7}$
$3)1 \frac{1}{3} \div ( - 5 \frac{3}{5} ) = \frac{4}{3} \times ( - \frac{5}{28} ) = \\ = - \frac{5}{21}$
$4) - \frac{6}{7} + ( - \frac{5}{21} ) = - \frac{18}{21} - \frac{5}{21} = \\ - \frac{23}{21} = - 1 \frac{2}{21}$