Решите пожалуйста 8 и 9 молю ааа

8) А - 1

В - 2

С - 5

$2 \frac{7}{16} \div 1 \frac{7}{8} - 5 \frac{7}{9} \times 2 \frac{1}{13} + 4 \frac{4}{5} = \\ = \frac{39}{16} \div \frac{15}{8} - \frac{52}{9} \times \frac{27}{13} + \frac{24}{5} = \\ = \frac{39 \times 8}{16 \times 15} - \frac{52 \times 27}{9 \times 13} + \frac{24}{5} = \\ = \frac{13}{10} - 12 + \frac{48}{10} = \\ = \frac{61}{10} - 12 = \\ = 6.1 - 12 = \\ = - 5.9$