1084. Сократите дроби: а) 3/6, 2/8, 4/10, 3/12, 6/12, 8/12, 3/9, 10/15; б) 4/12, 10/20, 5/20, 12/30, 21/27, 7/28, 36/45.

Сократим каждую дробь, разделив числитель и знаменатель на их общий делитель.

а)

\(\frac{3}{6}=\frac{1}{2}\), \(\frac{2}{8}=\frac{1}{4}\), \(\frac{4}{10}=\frac{2}{5}\), \(\frac{3}{12}=\frac{1}{4}\),

\(\frac{6}{12}=\frac{1}{2}\), \(\frac{8}{12}=\frac{2}{3}\), \(\frac{3}{9}=\frac{1}{3}\), \(\frac{10}{15}=\frac{2}{3}\).

б)

\(\frac{4}{12}=\frac{1}{3}\), \(\frac{10}{20}=\frac{1}{2}\), \(\frac{5}{20}=\frac{1}{4}\), \(\frac{12}{30}=\frac{2}{5}\),

\(\frac{21}{27}=\frac{7}{9}\), \(\frac{7}{28}=\frac{1}{4}\), \(\frac{36}{45}=\frac{4}{5}\).

Ответ: а) \(\frac{1}{2},\frac{1}{4},\frac{2}{5},\frac{1}{4},\frac{1}{2},\frac{2}{3},\frac{1}{3},\frac{2}{3}\); б) \(\frac{1}{3},\frac{1}{2},\frac{1}{4},\frac{2}{5},\frac{7}{9},\frac{1}{4},\frac{4}{5}\).