Вправи 301 - 400 » 322

Виконайте множення: 1) 93/7 ∙ 5/22 = 66/7 ∙ 5/22 = (3 • 5)/7 = 15/7 = 21/7; 2) 63/8 ∙ 16/17 = 51/8 ∙ 16/17 = (3 • 2)/(1 • 1) = 6; 3) 21/3 ∙ 11/5 = 7/3 ∙ 6/5 = (7 • 2)/5 = 14/5 = 24/5; 4) 191/2 ∙ 15/9 = 39/2 ∙ 14/9 = (13 • 7)/(1 • 3) = 91/3 = 301/3; 5) 21/4 ∙ 22/27 = 9/4 ∙ 56/27 = (1 • 14)/(1 • 3) = 42/3; 6) 28/11 ∙ 52/15 = 30/11 ∙ 77/15 = (2 • 7)/(1 • 1) = 14; 7) 7/9 ∙ 11/14 ∙ 52/5 = 7/9 ∙ 15/14 ∙ 27/5 = (1 • 3 • 3)/(1 • 2 • 3) = 9/2 = 41/2; 8) 22/3 ∙ 11/24 ∙ 52/5 = 8/3 ∙ 25/24 ∙ 27/5 = (1 • 5 • 9)/(1 • 3 • 1) = 15.