Вправи: 1036

1036. Знайдіть значення виразу:

1) –12 + (–25) + 53 = –37 + 53 = 16;

2) 21 + (–38) + 16 = –38 + 37 = –1;

3) 8,7 + (–4,8) + (–3,6) = 8,7 + (–8,4) = 0,3;

4) –0,9 + 7,2 + (–7,8) = –8,7 + 7,2 = –1,5;

5) 5 + (–15) + 25 + (–35) = 30 + (–50) = –20;

6) 19 + (–28) + (–17) + 28 = 47 + (–45) = 2;

7) –1,9 + 7,3 + (–8,7) + 1,6 = –10,6 + 8,9 = –1,7;

8) 8 + (–1,8) + (–4,2) + (–2) = 8 + (–8) = 0;

9) –5 + (–4) + (–3) + 3 + 4 + 5 + 6 = –12 + 18 = 6.