Завдання 501 - 600 » 505

Знайди значення виразу: 1. (25/24 – 17/32) · 210/19 – 21/4 = 1/4. 1) 25/24 – 17/32 = 129/24 – 17/32 = (116 - 21)/96 = 95/96; 2) 95/96 · 210/19 = (95 ∙ 48)/(96 ∙ 19) = 5/2 = 21/2; 3) 21/2 – 21/4 = (2-1)/4 = 1/4. 2. 71/96 : (27/8 · 9/46 + 11/12) = 1/2. 1) 27/8 · 9/46 = (23 ∙ 9)/(8 ∙ 46) = 9/16; 2) 6/16 + 11/12 = (27 + 44)/48 = 71/48; 3) 71/96 : 71/48 = (71 ∙ 48)/(96 ∙ 71) = 1/2.