Завдання 1101 - 1200 » 1179

Обчисліть: 1) 31/2 + 78,6 + (–3,5) = 3,5 + 75,1 = 78,6; 2) 1/4 + (–3/5) + (–0,35) = 0,25 + (–0,6) + (–0,35) = 0,25 + (–0,95) = –0,7; 3) 3,71 + (–13,6) + (–71/100) = (3,71 + (–0,71)) + (–13,6) = 3 + (–13,6) = –10,6; 4) 1015/19 + (–438/13) + 124/19 + (–565/13) = (1015/19 + 124/19) + (–438/13 + (–565/13)) = 23 + (–100) = –77.