55 Вправа 55Алгебра 8 клас Бевз 2025 · § 2 · стор. 19

55. Скороти дріб.

а) ${\displaystyle \frac{2a}{4b}=}$${\displaystyle \frac{\cancel{2}a}{\cancel{2}\cdot 2b}=}$${\displaystyle \frac{a}{2b}}$;

б) ${\displaystyle \frac{a^5}{a^7}=}$${\displaystyle \frac{\cancel{a^5}}{\cancel{a^5}\cdot a^2}=}$${\displaystyle \frac{1}{a^2}}$;

в) ${\displaystyle -\frac{x}{x^4}=}$${\displaystyle -\frac{\cancel{x}}{\cancel{x}\cdot x^3}=}$${\displaystyle -\frac{1}{x^3}}$;

г) ${\displaystyle \frac{6a^2}{12a^3}=}$${\displaystyle \frac{\cancel{6a^2}}{\cancel{6a^2}\cdot 2a}=}$${\displaystyle \frac{1}{2a}}$;

ґ) ${\displaystyle \frac{3c}{15c^4}=}$${\displaystyle \frac{\cancel{3c}}{\cancel{3c}\cdot 5c^3}=}$${\displaystyle \frac{1}{5c^3}}$;

д) ${\displaystyle \frac{4\cancel{a}}{\cancel{a}}=}$${\displaystyle 4}$.