Завдання 1201 - 1300 » 1202

Виконай множення: 1) – 1/3 · 3/5 = – (1 ∙ 3)/(3 ∙ 5) = – 1/5; 2) – 1/6 · (–6/17) = (1 ∙ 6)/(6 ∙ 17) = 1/17; 3) 3/7 · (–14/15) = – (3 ∙ 14)/(7 ∙ 15) = – 2/5; 4) –11 · 15/22 = – (11 ∙ 15)/(1 ∙ 22) = – 15/2 = –71/2; 5) – 17/26 · (–13) = (17 ∙ 13)/(26 ∙ 1) = 17/2 = 81/2; 6) –12/13 · (–26/27) = (12 ∙ 26)/(13 ∙ 27) = 8/9; 7) 6/35 · (–25/36) = – (6 ∙ 25)/(35 ∙ 36) = – 5/42; 8) 13/24 · (–16/39) = – (13 ∙ 16)/(24 ∙ 39) = – 2/9.