1 12a³b⁵ : 8¹⁰ 36a⁸b

1) $$ \frac{12a^3b^5}{810} : \frac{36a^8b}{1} = \frac{12a^3b^5}{810} \cdot \frac{1}{36a^8b} = \frac{12a^3b^5}{810 \cdot 36a^8b} = \frac{12}{810 \cdot 36} \cdot \frac{a^3}{a^8} \cdot \frac{b^5}{b} = \frac{1}{2430} \cdot \frac{1}{a^5} \cdot b^4 = \frac{b^4}{2430a^5} $$

Ответ: $$\frac{b^4}{2430a^5}$$