Завдання 501 - 600 » 530

Обчисліть: 1) (21/4 – 2/3) : 19/24 = (27 - 8)/12 : 19/24 = 19/12 ∙ 24/19 = 2/1 = 2; 2) 18/19 ∙ (31/3 – 1/6) = 18/19 ∙ (20 - 1)/6 = 18/19 ∙ 19/6 = 3/1 ∙ 1/1 = 3; 3) (1/2)3 ∙ 42 = 1/2 ∙ 1/2 ∙ 1/2 ∙ 16 = 1/8 ∙ 16 = 2.