№3. Сравните дроби: 2/4 и 4/10; 9/30 и 27/70; 25/28 и 13/14.

1. \(\frac{2}{4}=\frac{1}{2}=\frac{5}{10}>\frac{4}{10}\), значит \(\frac{2}{4}>\frac{4}{10}\).
2. \(\frac{9}{30}=\frac{3}{10}=\frac{21}{70}<\frac{27}{70}\), значит \(\frac{9}{30}<\frac{27}{70}\).
3. \(\frac{13}{14}=\frac{26}{28}>\frac{25}{28}\), значит \(\frac{25}{28}<\frac{13}{14}\).

Ответ: 2/4 > 4/10; 9/30 < 27/70; 25/28 < 13/14.