3. Выполните деление: а) 6/25 : 9/5; б) 6 2/3 : 1 1/8; в) 3/8 : 2/3; г) 4 1/11 : 2 19/22; д) 8/27 : 8/9; е) 57 : 19/24; ж) 14/39 : 21/52; з) 11 2/5 : 3 4/5; и) 9 5/7 : 1 23/28; к) 36/47 : 18; л) 16/17 : 8; м) 12 : 6/7.

При делении дробей умножаем первую дробь на дробь, обратную второй.

1. \(\frac{6}{25}:\frac{9}{5}=\frac{6}{25}\cdot\frac{5}{9}=\frac{2}{15}\).
2. \(6\frac{2}{3}:1\frac{1}{8}=\frac{20}{3}\cdot\frac{8}{9}=\frac{160}{27}=5\frac{25}{27}\).
3. \(\frac{3}{8}:\frac{2}{3}=\frac{3}{8}\cdot\frac{3}{2}=\frac{9}{16}\).
4. \(4\frac{1}{11}:2\frac{19}{22}=\frac{45}{11}\cdot\frac{22}{63}=\frac{10}{7}=1\frac{3}{7}\).
5. \(\frac{8}{27}:\frac{8}{9}=\frac{8}{27}\cdot\frac{9}{8}=\frac{1}{3}\).
6. \(57:\frac{19}{24}=57\cdot\frac{24}{19}=72\).
7. \(\frac{14}{39}:\frac{21}{52}=\frac{14}{39}\cdot\frac{52}{21}=\frac{8}{9}\).
8. \(11\frac{2}{5}:3\frac{4}{5}=\frac{57}{5}\cdot\frac{5}{19}=3\).
9. \(9\frac{5}{7}:1\frac{23}{28}=\frac{68}{7}\cdot\frac{28}{51}=\frac{16}{3}=5\frac{1}{3}\).
10. \(\frac{36}{47}:18=\frac{36}{47}\cdot\frac{1}{18}=\frac{2}{47}\).
11. \(\frac{16}{17}:8=\frac{16}{17}\cdot\frac{1}{8}=\frac{2}{17}\).
12. \(12:\frac{6}{7}=12\cdot\frac{7}{6}=14\).

Ответ: а) \(\frac{2}{15}\); б) \(5\frac{25}{27}\); в) \(\frac{9}{16}\); г) \(1\frac{3}{7}\); д) \(\frac{1}{3}\); е) 72; ж) \(\frac{8}{9}\); з) 3; и) \(5\frac{1}{3}\); к) \(\frac{2}{47}\); л) \(\frac{2}{17}\); м) 14.