Ответ:
а) \(\frac{1}{5}−\frac{1}{50}=\frac{10}{50}−\frac{1}{50}=\frac{9}{50}\).
б) \(\frac{21}{5}\cdot\frac{3}{7}=\frac{9}{5}\).
в) \(\frac{14}{5}:\frac{7}{2}=\frac{14}{5}\cdot\frac{2}{7}=\frac{4}{5}\).
г) \(\frac{1}{2}+\frac{11}{10}=\frac{5}{10}+\frac{11}{10}=\frac{8}{5}=1\frac{3}{5}\).
д) \(\frac{1}{10}+\frac{29}{20}=\frac{2}{20}+\frac{29}{20}=\frac{31}{20}=1\frac{11}{20}\).
е) \(\frac{5}{3}\cdot\frac{9}{2}=\frac{15}{2}=7\frac{1}{2}\).
ж) \(\frac{5}{16}:\frac{25}{8}=\frac{5}{16}\cdot\frac{8}{25}=\frac{1}{10}\).
з) \(\frac{3}{4}−\frac{7}{16}=\frac{12}{16}−\frac{7}{16}=\frac{5}{16}\).
Ответ: а) 9/50; б) 9/5; в) 4/5; г) 1 3/5; д) 1 11/20; е) 7 1/2; ж) 1/10; з) 5/16.
