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

Сравним дроби в каждой паре:

\(\frac{2}{4}=\frac{1}{2}=\frac{5}{10}\), а \(\frac{5}{10}>\frac{4}{10}\). Значит, \(\frac{2}{4}>\frac{4}{10}\).

\(\frac{9}{30}=\frac{3}{10}=\frac{21}{70}\), а \(\frac{21}{70}<\frac{27}{70}\). Значит, \(\frac{9}{30}<\frac{27}{70}\).

\(\frac{13}{14}=\frac{26}{28}\), а \(\frac{25}{28}<\frac{26}{28}\). Значит, \(\frac{25}{28}<\frac{13}{14}\).

Ответ: \(\frac{2}{4}>\frac{4}{10}\); \(\frac{9}{30}<\frac{27}{70}\); \(\frac{25}{28}<\frac{13}{14}\).