Вправи 901 - 1000 » 927
Знайдіть значення виразу: (21/4 – 11/4 ∙ (2/7 + 31/7 ∙ 1/3)) : 0,7 = (21/4 – 5/4 ∙ (2/7 + 22/7 ∙ 1/3)) ∙ 10/7 = (21/4 – 5/4 ∙ 28/21) ∙ 10/7 = (21/4 – 5/3) ∙ 10/7 = (15/4 – 12/3) ∙ 10/7 = 7/12 ∙ 10/7 = 5/6.
Знайдіть значення виразу: (21/4 – 11/4 ∙ (2/7 + 31/7 ∙ 1/3)) : 0,7 = (21/4 – 5/4 ∙ (2/7 + 22/7 ∙ 1/3)) ∙ 10/7 = (21/4 – 5/4 ∙ 28/21) ∙ 10/7 = (21/4 – 5/3) ∙ 10/7 = (15/4 – 12/3) ∙ 10/7 = 7/12 ∙ 10/7 = 5/6.