Завдання 401 - 500 » 439

Виконай ділення: 1) 2/5 : 3/7 = 2/5 · 7/3 = 14/15; 2) 3/11 : 1/2 = 3/11 · 2/1 = 6/11; 3) 4/7 : 3/5 =4/7 · 5/3 = 20/21; 4) 7/8 : 1/5 = 7/8 · 5/1 = 35/8 = 43/8; 5) 1/11 : 1/13 = 1/11 · 13/1 = 13/11 = 12/11; 6) 1/6 : 5/12 = 1/6 · 12/5 = (1 ∙ 12)/(6 ∙ 5) = 2/5; 7) 1/9 : 7/18 = 1/9 · 18/7 = (1 ∙ 18)/(9 ∙ 7) = 2/7; 8) 7/9 : 14/27 = 7/9 · 27/14 = (7 ∙ 27)/(9 ∙ 14) = 3/2 = 11/2; 9) 7 : 7/8 = 7/1 · 8/7 = 8/1 = 8; 10) 5/11 : 10 = 5/11 : 10/1 = (5 ∙ 1)/(11 ∙ 10) = 1/22.