Question

-12/13*1 5/8=
-5 1/4*(-2 1/3)=
-1 5/7*(-6 1/8)=
3 3/5*(-2 7/9)=
Пожалуйста решите математику прошууу

Answer 1

Ответ:

$1) - \frac{15}{26}$

$2)12 \frac{1}{4}$

$3)10 \frac{1}{2}$

$4) - 10$

Пошаговое объяснение:

$- \frac{12}{13} \times 1 \frac{5}{8} = - \frac{12}{13} \times \frac{5}{8} = - \frac{3}{13} \times \frac{5}{2} = - \frac{15}{26}$

$- 5 \frac{1}{4} \times ( - 2 \frac{1}{3} ) = - \frac{21}{4} \times ( - \frac{7}{3} ) = \frac{21}{4} \times \frac{7}{3} = \frac{7}{4} \times 7 = \frac{49}{4} = 12 \frac{1}{4}$

$- 1 \frac{5}{7} \times ( - 6 \frac{1}{8} ) = - \frac{12}{7} \times ( - \frac{49}{8} ) = \frac{12}{7} \times \frac{49}{8} = 12 \times \frac{7}{8} = 3 \times \frac{7}{2} = \frac{21}{2} = 10 \frac{1}{2}$

$3 \frac{3}{5} \times ( - 2 \frac{7}{9} ) = \frac{18}{5} \times ( - \frac{25}{9} ) = - \frac{18}{5} \times \frac{25}{9} = - \frac{2}{5} \times 25 = - 2 \times 5 = - 10$