Question

виконай дії 21•5/14:3/4​

Answer 1

$21 \times \frac{5}{14} \div \frac{3}{4} = 8 \times \frac{5}{7} \times 2 = \frac{8}{1} \times \frac{5}{7} \times \frac{2}{1} = \frac{8 \times 5 \times 2}{1 \times 7 \times 1} = \frac{80}{7} = 11 \frac{3}{7}$