ГДЗ Алгебра 8 клас Істер (2025)

Виконайте дію:

1) 5a/7 • 21/(20a^2 ) = (5a • 21)/(7 • 20a^2 ) = 3/4a;
2) 3,5/(14a^2 ) • (4a^3)/5b = (3,5 • 4a^3)/(14a^2 • 5b) = 14a/(14 • 5b) = a/5b;
3) c^2/30 • 20/cm = (c^2 • 20)/(30 • cm) = 2c/3m;
4) –3m/(5a^2 ) • a/(9m^2 ) = –3am/(5a^2 • 9m^2 ) = –1/15am;
5) (4x^2)/7p • (–21p/(8x^3 )) = –(4x^2 • 21p)/(7p • 8x^3 ) = –3/2x;
6) –(5x^2)/(7y^3 ) • (–(21y^2)/25x) = (5x^2 • 21y^2)/(7y^3 • 25x) = 3x/5y.