Question

calculati: 3:4/5, 5:3/8, 5/2:7, 9/7:4, (-6):15/7, (-4):(-6/5), 15/8:(-9), ( -4/5):(-8)​

Answer 1

$3 \div \frac{4}{5} = 3 \times \frac{5}{4} = \frac{15}{4} \\ \\ 5 \div \frac{3}{8} = 5 \times \frac{8}{3} = \frac{40}{3} \\ \\ \frac{9}{7} \div 4 = \frac{9}{7} \times \frac{1}{4} = \frac{9}{28}$

$- 6 \div \frac{15}{7} = - 6 \times \frac{7}{15} = - \frac{42}{15}$

$- 4 \div( - \frac{6}{5} ) = - 4 \times (- \frac{5}{6} ) = \\ 4 \times \frac{5}{6} = \frac{20}{6} {}^{(2} = \frac{10}{3}$

$\frac{15}{8} \div ( - 9) = \frac{15}{8} \times( - \frac{1}{9} ) = - \frac{15}{72}$

$- \frac{4}{5} \div 8 = - \frac{4}{5} \times \frac{1}{8} = \\ = - \frac{4}{40} {}^{(4} = - \frac{1}{10}$