Сравните дроби: 7/13 и 1/2, 8/17 и 1/2, 2/5 и 1/2, 5/8 и 1/2

1) 7/13 = 7 * 2/(13 * 2) = 14/26;

1/2 = 13/(2 * 13) = 13/26;

14 > 13;

Ответ: 7/13 > 1/2.

2) 8/17 = 8 * 2/(17 * 2) = 16/34;

1/2 = 17/(2 * 17) = 17/34;

16 < 17;

Ответ: 8/17 < 1/2.

3) 2/5 = 2 * 2/(5 * 2) = 4/10;

1/2 = 5/(5 * 2) = 5/10;

4 < 5;

Ответ: 2/5 < 1/2.

4) 1/2 = 4/(2 * 4) = 4/8;

5 > 4;

Ответ: 5/8 > 1/2.