Найдите значения выражения: (2,5 - 2 целых 1/3) × (- 5 целых 1/7) + 1 целая 1/3 ÷ (-5,6)...

Решите задачу:

$(2.5 - 2 \frac{1}{3} ) \times ( - 5 \frac{1}{7} ) + 1 \frac{1}{3} \div ( - 5.6) = \\ 1). \: \: 2.5 - 2 \frac{1}{3} = 2 \frac{1}{2} - 2 \frac{1}{3} = \frac{3 - 2}{6} = \frac{1}{6} \\ 2). \: \: \frac{1}{6} \times ( - 5 \frac{1}{7} ) = \frac{1}{6} \times ( - \frac{36}{7} ) = - \frac{6}{7} \\ 3). \: \: \: 1 \frac{1}{3} \div ( - 5.6) = 1 \frac{1}{3} \div ( - 5 \frac{3}{5} ) = \frac{4}{3} \times ( - \frac{5}{28} ) = - \frac{5}{21} \\ 4). \: \: ( - \frac{6}{7}) +( - \frac{5}{21} ) = - ( \frac{18 + 5}{21} = - \frac{23}{21} = - 1 \frac{2}{21}$