Завдання 1101 - 1200 » 1101

1101

Обчисли: 1) 4/19 + (–5/19) + 7/19 + (–13/19) = (4 + 7 - 5-13)/19 = – 7/19; 2) 12/3 + (–8/17) + 51/3 + (–9/17) = 12/3 + 51/3 + ((–8/17) + (–9/17)) = 7 + (–1) = 6; 3) –51/7 + 44/7 + 26/7 + (–12/7) = –51/7 + (–12/7) + (44/7 + 26/7) = –63/7 + 610/7 = = –63/7 + 73/7 = 1; 4) 91/11 + 57/13 + (–83/11) + (–57/13) = 812/11 + (–83/11) = 9/11.

Завдання 1101 - 1200