Question

Срочно!!!!!
Даю 4О баллов!!!

Answer 1

1)

$( - 2.9 + 5) \times ( - 1 \frac{1}{14} ) = 2.1 \times( - 1 \frac{ 1}{14} ) = - \frac{21 \times 15}{10 \times 14} =\\= - \frac{3 \times 3}{2 \times 2} = - \frac{9}{4} = - 2.25$

2)

$( - \frac{5}{9} + \frac{14}{15} ) \div ( - \frac{17}{30} ) = \frac{42 - 25}{45} \div ( - \frac{17}{30} ) = - \frac{17 \times 30}{45 \times 17} = - \frac{2}{3}$