Question

Номер 512
(-4 2/3) : 2/9=?
(-6 1/4) : (-5/8)=?​

Answer 1

Пошаговое объяснение:

Ответ: $( - 4 \frac{2}{3} ) \div \frac{2}{9} = - 21$

$- 4 \frac{2}{3} \div \frac{2}{9} = - \frac{2 + 4 \times 3}{3} \div \frac{2}{9} = - \frac{14}{3} \div \frac{2}{9} = - \frac{14}{3} \times \frac{9}{2} = - \frac{14 \times 9}{3 \times 2} = - \frac{126}{6} = - \frac{21 \times 6}{6} = - 21$

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Ответ: $( - 6 \frac{1}{4} ) \div ( - \frac{5}{8} ) = 10$

$- 6 \frac{1}{4} \div ( - \frac{5}{8} ) = 6 \frac{1}{4} \div \frac{5}{8} = \frac{1 + 6 \times 4}{4} \div \frac{5}{8} = \frac{25}{4} \div \frac{5}{8} = \frac{25}{4} \times \frac{8}{5} = \frac{25 \times 8}{4 \times 5} = \frac{200}{20} = \frac{10 \times 20}{20} = 10$