Завдання 1201 - 1300 » 1247

Знайди значення виразу: 1) –6,8 · 1/9 · (–1/4) · (–2,7) = – (68 ∙ 1)/(10 ∙ 4) · (27 ∙ 1)/(10 ∙ 9) = – 17/10 · 3/10 = – 51/100 = –0,51; 2) –22/3 · (–0,4) · 0,75 · 13/4 = –22/3 · (–2/5) · 3/4 · 13/4 = (8 ∙ 2 ∙ 3 ∙ 7)/(3 ∙ 5 ∙ 4 ∙ 4) = 7/5 = 1,4; 3) 0,375 · (–15/7) · 4/9 · 21/3 = 3/8 · (–15/7) · 4/9 · 21/3 = – (3 ∙ 12 ∙ 4 ∙ 7)/(8 ∙ 7 ∙ 9 ∙ 3) = – 2/3; 4) –12/11 · (–181/3) · (–1,8) · (–12/13) = (13 ∙ 55 ∙ 9 ∙ 12)/(11 ∙ 3 ∙ 5 ∙ 13) = 36.