Номер 1065

–3,75 + 0,785 = –2,965;

2,6 + (–1,94) = 0,66;

–2/7 + 1 = –2/7 + 7/7 = 5/7;

4,2 + (–4,2) = 0;

3/14 + (–11/21) = 9/42 + (–22/42) = –13/22;

–1 + 5/9 = –9/9 + 5/9 = –4/9.