Завдання 1101 - 1200 » 1147

Виконай дії: 1) 32/5 + (–41/3) – 27/15 = 32/5 + (–41/3) + (–27/15) = 32/5 + (–6(5 + 7)/15) = 32/5 + (–612/15) = 32/5 + (–64/5) = –(64/5 – 32/5) = –32/5; 2) 25/14 – 45/8 – (–35/12) + (–1/6) = 25/24 + (–45/8) + 35/12 + (–1/6) = 5(5 + 10)/24 + (–4(15 + 4)/24) = 515/24 + (–419/24) = 439/24 + (–419/24) = 20/24 = 5/6; 3) –21/4 + 3,7 – 2,9 – (–32/5) = –2,25 + 3,7 + (–2,9) + 3,4 = 7,1 + + (–5,15) = 1,95; 4) 4,9 – 73/10 – 83/4 – (–8,2) = 4,9 + (–7,3) + (–8,75) + 8,2 = 13,1 + + (–16,05) = –2,95.