56 Вправа 56Алгебра 8 клас Бевз 2025 · § 2 · стор. 19

56. Скороти дріб.

а) ${\displaystyle \frac{a^3}{-a^5}=}$${\displaystyle \frac{\cancel{a^3}}{-\cancel{a^3}\cdot a^2}=}$${\displaystyle -\frac{1}{a^2}}$;

б) ${\displaystyle \frac{-6c^3}{2c^5}=}$${\displaystyle \frac{-3\cdot \cancel{2c^3}}{\cancel{2c^3}\cdot c^2}=}$${\displaystyle -\frac{3}{c^2}}$;

в) ${\displaystyle \frac{-\cancel{x}}{-\cancel{x}a}=}$${\displaystyle \frac{1}{a}}$;

г) ${\displaystyle \frac{7b^3}{14b^3}=}$${\displaystyle \frac{\cancel{7b^3}}{\cancel{7b^3}\cdot 2}=}$${\displaystyle \frac{1}{2}}$;

ґ) ${\displaystyle \frac{18}{9a^{2}x}=}$${\displaystyle \frac{2\cdot \cancel{9}}{\cancel{9}{a}^{2}x}=}$${\displaystyle \frac{2}{a^{2}x}}$;

д) ${\displaystyle \frac{-2a^2}{-a}=}$${\displaystyle \frac{-2a\cdot \cancel{a}}{-\cancel{a}}=}$${\displaystyle 2a}$.