Вправи 1001 - 1100 » 1070

Розкрийте дужки: 1) –12 (5/6a – 1/4b + 7/24c – 1/12) = –10a + 3b – 7/2c + 1; 2) (16a + 8b – 5/9c – 4/9d) ∙ (–9/32n) = –9/2an – 9/4bn + 5/32cn + 1/8dn; 3) –4/15bc ∙ (–45a – 30d + 33/4m – 3/8) = (45 • 4)/15abc + (30 • 4)/15bcd – (15 • 4)/(4 • 15)bcm + (3 • 4)/(8 • 15)bc = 12abc + 8bcd – bcm + 1/10bc; 4) (–3,6аb + 20а – b – 100) ∙ (–5ху) = 18аbху – 100аху + 5bху + 500ху.