Сравните: 3/7 и 1,7/8 и 2/3,129/130 и 12/13, 10/9 и 5/4

1) 1 = 7/7;

3/7 < 7/7;

Ответ: 3/7 < 1.

2) 7/8 = 7 * 3 / (8 * 3) = 21/24;

2/3 = 2 * 8 / (3 * 8) = 16/24;

21 > 16;

Ответ: 7/8 > 2/3.

3) 12/13 = 120/130;

129 > 120;

Ответ: 129/130 > 12/13.

4) 10/9 = 4 * 10/36 = 40/36;

5/4 = 5 * 9/36 = 45/36;

40 < 45;

Ответ: 10/9 < 5/4.