Ответ:

[tex]a) \frac{13}{14} - \frac{3}{4} = \frac{26 - 21}{28} = \frac{5}{28} [/tex]

[tex]b) \frac{11}{12} - \frac{7}{8} = \frac{22 - 21}{24} = \frac{1}{24} [/tex]

[tex]c) \frac{14}{15} - \frac{7}{10} = \frac{28 - 21}{30} = \frac{7}{30} [/tex]

[tex]d) \frac{7}{16} - \frac{5}{12} = \frac{21 - 20}{48} = \frac{1}{48} [/tex]