Найдите: 1) n+m; 2) n-m; 3) nm; 4) n:m, если 0,5

1). n + m:

0,5 + 8/9 < n + m < 5 1/3 + 4,5,

1/2 + 8/9 < n + m < 16/3 + 9/2,

25/18 < n + m < 59/6,

1,38 < n + m < 9,83.

2). n - m:

0,5 - 8/9 < n - m < 5 1/3 - 4,5,

1/2 - 8/9 < n - m < 16/3 - 9/2,

- 7/18 < n - m < 5/6,

- 0,38 < n - m < 0,83.

3) n * m:

0,5 * 8/9 < n * m < 5 1/3 * 4,5,

1/2 * 8/9 < n * m < 16/3 * 9/2,

4/9 < n * m < 24,

0,44 < n * m < 24.

4). n/m:

0,5 / (8/9) < n/m < (5 1/3) / 4,5,

1/2 * 9/8 < n/m < 16/3 * 2/9,

9/16 < n/m < 32/27,

0,56 < n/m < 1,18.