2. Приведите к наименьшему общему знаменателю дроби: 1) 1/9 и 1/6; 2) 7/12 и 5/8; 3) 4/39 и 7/13; 4) 3/8 и 5/9; 5) 14/15 и 11/12; 6) 3/4, 5/14 и 4/7.

1. НОЗ(9, 6) = 18: \(\frac{1}{9}=\frac{2}{18}\), \(\frac{1}{6}=\frac{3}{18}\).
2. НОЗ(12, 8) = 24: \(\frac{7}{12}=\frac{14}{24}\), \(\frac{5}{8}=\frac{15}{24}\).
3. НОЗ(39, 13) = 39: \(\frac{4}{39}=\frac{4}{39}\), \(\frac{7}{13}=\frac{21}{39}\).
4. НОЗ(8, 9) = 72: \(\frac{3}{8}=\frac{27}{72}\), \(\frac{5}{9}=\frac{40}{72}\).
5. НОЗ(15, 12) = 60: \(\frac{14}{15}=\frac{56}{60}\), \(\frac{11}{12}=\frac{55}{60}\).
6. НОЗ(4, 14, 7) = 28: \(\frac{3}{4}=\frac{21}{28}\), \(\frac{5}{14}=\frac{10}{28}\), \(\frac{4}{7}=\frac{16}{28}\).

Ответ: 1) 2/18 и 3/18; 2) 14/24 и 15/24; 3) 4/39 и 21/39; 4) 27/72 и 40/72; 5) 56/60 и 55/60; 6) 21/28, 10/28 и 16/28.