Приведите к наименьшему общему знаменателю дроби: 1) 2/9 и 5/6; 2) 5/12 и 7/8; 3) 3/26 и 9/13; 4) 5/8 и 6/7; 5) 7/12 и 8/15; 6) 3/8, 5/6 и 7/12.

1. НОЗ(9, 6) = 18: \(\frac{2}{9}=\frac{4}{18}\), \(\frac{5}{6}=\frac{15}{18}\).
2. НОЗ(12, 8) = 24: \(\frac{5}{12}=\frac{10}{24}\), \(\frac{7}{8}=\frac{21}{24}\).
3. НОЗ(26, 13) = 26: \(\frac{3}{26}=\frac{3}{26}\), \(\frac{9}{13}=\frac{18}{26}\).
4. НОЗ(8, 7) = 56: \(\frac{5}{8}=\frac{35}{56}\), \(\frac{6}{7}=\frac{48}{56}\).
5. НОЗ(12, 15) = 60: \(\frac{7}{12}=\frac{35}{60}\), \(\frac{8}{15}=\frac{32}{60}\).
6. НОЗ(8, 6, 12) = 24: \(\frac{3}{8}=\frac{9}{24}\), \(\frac{5}{6}=\frac{20}{24}\), \(\frac{7}{12}=\frac{14}{24}\).

Ответ: 1) 4/18 и 15/18; 2) 10/24 и 21/24; 3) 3/26 и 18/26; 4) 35/56 и 48/56; 5) 35/60 и 32/60; 6) 9/24, 20/24 и 14/24.