Вправи 201 - 300 » 206

Скоротіть дріб: 1) 5/15 = (5∶ 5)/(15∶ 5) = 1/3; 2) 6/20 = (6 ∶ 2)/(20 ∶ 2) = 3/10; 3) 14/35 = (14 ∶ 7)/(35 ∶ 7) = 2/5; 4) 21/39 = (21 ∶ 3)/(39 ∶ 3) = 7/13; 5) 10/60 = (10 ∶ 10)/(60 ∶ 10) = 1/6; 6) 28/84 = (28 ∶ 28)/(84 ∶ 28) = 1/3;