Вправи 601 - 689 » 605

Знайдіть значення виразу: 1) (31/3 + 2,5) ∙ (4,6 – 21/3) = (31/3 + 21/2) ∙ (43/5 – 21/3) = 55/6 ∙ 24/15 = 35/6 ∙ 34/15 = 119/9 = 132/9; 2) (4,5 ∙ 12/3 – 6,75) ∙ (11/3)3 =(9/2 ∙ 5/3 – 63/4) ∙ (4/3)3 = (71/2 – 63/4) ∙ 64/27 = (66/4 – 63/4) ∙ 64/27 = 3/4 ∙ 64/27 = 16/9 = 17/9.