Ответ:
а) \(\frac{11}{16}-\frac{3}{8}=\frac{11}{16}-\frac{6}{16}=\frac{5}{16}\).
б) \(\frac{5}{6}-\frac{5}{12}=\frac{10}{12}-\frac{5}{12}=\frac{5}{12}\).
в) \(\frac{4}{7}-\frac{8}{21}=\frac{12}{21}-\frac{8}{21}=\frac{4}{21}\).
г) \(\frac{17}{30}-\frac{4}{15}=\frac{17}{30}-\frac{8}{30}=\frac{9}{30}=\frac{3}{10}\).
Ответ: а) \(\frac{5}{16}\); б) \(\frac{5}{12}\); в) \(\frac{4}{21}\); г) \(\frac{3}{10}\).
