6)

[tex] \frac{ - 2 \frac{7}{24} \div 1 \frac{5}{6} - 1.6 \times ( - 0.3) }{ - 9.5 \div (5 \frac{7}{10} - 4 \frac{12}{35}) } = 0.11 \\ 1) \: - 2 \frac{7}{24} \div 1 \frac{5}{6} = - \frac{55 \times 6}{24 \times 11} = - \frac{5}{4} = - 1.25 \\ 2) \: - 1.6 \times (- 0.3) = 0.48 \\ 3) \: - 1.25 + 0.48 = - 0.77 \\ 4) \: 5 \frac{7}{10} - 4 \frac{12}{35} = 5 \frac{49}{70} - 4 \frac{24}{70} = 1 \frac{25}{70} = 1 \frac{5}{14} \\ 5) \: - 9.5 \div 1 \frac{5}{14} = - \frac{19 \times 14}{2 \times 19} = - 7 \\ 6) \: - 0.77 \div ( - 7) = 0.11[/tex]

8)

[tex]( - 13.6 + 5.1) \times 1 \frac{3}{17} + (2 \frac{7}{23} - 1 \frac{45}{46} ) \div 1 \frac{7}{23} = - 2.5 \\ 1) \: - 13.6 + 5.1 = - 8.5 \\ 2) \: - 8.5 \times 1 \frac{3}{17} = - \frac{17 \times 20}{2 \times 17} = - 10 \\ 3) \: 2 \frac{7}{23} - 1 \frac{45}{46} = 2 \frac{14}{46} - 1 \frac{45}{46} = 1 \frac{60}{46} - 1 \frac{45}{46} = \frac{15}{46} \\ 4) \: \frac{15}{46} \div 1 \frac{7}{23} = \frac{15\times 23}{46 \times 30} = \frac{1}{4} \\ 5) \: - 10 \times \frac{1}{4} = - \frac{5}{2} = - 2.5[/tex]