482 6) 5m 10m³ n2 n

6) $$ \frac{5m}{n^2} : \frac{10m^3}{n} = \frac{5m}{n^2} \cdot \frac{n}{10m^3} = \frac{5mn}{10m^3n^2} = \frac{1}{2m^2n} $$

Ответ: $$ \frac{1}{2m^2n} $$