Вычисли значение выражения: a) 1/6 - (1 - 17/18); б) 3 - (11/14 - 13/21); в) 7 14/25 - (3 8/15 + 1 9/10); г) 6 3/16 - 2 5/24 - 3 11/12

a) $\frac{1}{6} - (1 - \frac{17}{18}) = \frac{1}{6} - (\frac{18}{18} - \frac{17}{18}) = \frac{1}{6} - \frac{1}{18} = \frac{3}{18} - \frac{1}{18} = \frac{2}{18} = \frac{1}{9}$ б) $3 - (\frac{11}{14} - \frac{13}{21}) = 3 - (\frac{33}{42} - \frac{26}{42}) = 3 - \frac{7}{42} = 3 - \frac{1}{6} = \frac{18}{6} - \frac{1}{6} = \frac{17}{6} = 2\frac{5}{6}$ в) $7\frac{14}{25} - (3\frac{8}{15} + 1\frac{9}{10}) = 7\frac{14}{25} - (3\frac{16}{30} + 1\frac{27}{30}) = 7\frac{14}{25} - 4\frac{43}{30} = 7\frac{14}{25} - 5\frac{13}{30} = 7\frac{84}{150} - 5\frac{65}{150} = 2\frac{19}{150}$ г) $6\frac{3}{16} - 2\frac{5}{24} - 3\frac{11}{12} = 6\frac{9}{48} - 2\frac{10}{48} - 3\frac{44}{48} = 5\frac{57}{48} - 2\frac{10}{48} - 3\frac{44}{48} = 3\frac{47}{48} - 3\frac{44}{48} = \frac{3}{48} = \frac{1}{16}$ **Ответ:** a) $\frac{1}{9}$ б) $2\frac{5}{6}$ в) $2\frac{19}{150}$ г) $\frac{1}{16}$