Question

Срочно пожалуйста !!!!

Answer 1

$a) - \frac{7}{9} \times ( - 7 \frac{8}{17} )( - \frac{9}{7} ) = \frac{7 }{9} \times \frac{9}{7} \times ( - 7 \frac{8}{17} ) = - 7 \frac{8}{17} .$

$b) - \frac{7}{11} \times ( - 8.4) \times 1 \frac{4}{7} \times ( - 0.5) = - \frac{7}{11} \times \frac{11}{7} \times \frac{84}{10} \times \frac{5}{10} = - 1 \times \frac{21}{5} = - \frac{21}{5} .$