Завдання 501 - 600 » 532

Знайдіть значення виразу: 1) 21/6 – 12/9 : 32/3 = 21/6 – 11/9 ∙ 3/11 = 21/6 – 1/3 = 17/6 – 2/6 = 15/6; 2) 42/5 : (7/10 + 23/5) = 42/5 : (7/10 + 26/10) = 42/5 : 33/10 = 22/5 ∙ 10/33 = 4/3 = 11/3; 3) 7 ∙ (2/3)3 : (4/9)2 = 7 ∙ 8/27 ∙ 81/16 = 7 ∙ 3/2 = 21/2 = 101/2; 4) 5/7 : (15/28 ∙ 2/9) = 5/7 : 5/42 = 5/7 ∙ 42/5 = 6; 5) 21/4 : (3/8 : 1/2) = 21/4 : (3/8 ∙ 2/1) = 9/4 : 3/4 = 9/4 ∙ 4/3 = 3; 6) 11/2 : (11/4 : 12/3) : 11/5 = 3/2 : (5/4 ∙ 3/5) ∙ 5/6 = 3/2 : 3/4 ∙ 5/6 = 3/2 ∙ 4/3 ∙ 5/6 = 5/3 = 12/3.