Срочно!!!!!!!!!!!!!!

1)
$- 25.7 - 13 \frac{3}{4} = - 25.7 - 13.75 = - 39.45$
2)
$- 17 \frac{1}{2} - 6.5 = - 17.5 - 6.5 = - 24$
3)
$- 8.8 - 13 \frac{5}{7} = - 8 \frac{4}{5} - 13 \frac{5}{7} = - 8 \frac{28}{35} - 13 \frac{25}{35} = - 21 \frac{53}{35} = - 22 \frac{18}{35}$
4)
$- 2 \frac{4}{15} - 4 \frac{7}{12} = - 2 \frac{16}{60} - 4 \frac{35}{60} = - 6 \frac{51}{60} = - 6 \frac{17}{20}$
5)
$- 6.25 - 15 \frac{1}{4} = - 6 \frac{1}{4} - 15 \frac{1}{4} = - 21 \frac{2}{4} = - 21 \frac{1}{2} = - 21.5$
6)
$- 0.09 - 8.2 = - 8.29$