2. Выполните действия: a) 1/5 + 4/11; б) 3/7 + 5/14; в) 8/9 - 7/12; г) 11/50 - 3/25 + 1/20

a) \(\frac{1}{5} + \frac{4}{11} = \frac{11}{55} + \frac{20}{55} = \frac{31}{55}\) б) \(\frac{3}{7} + \frac{5}{14} = \frac{6}{14} + \frac{5}{14} = \frac{11}{14}\) в) \(\frac{8}{9} - \frac{7}{12} = \frac{32}{36} - \frac{21}{36} = \frac{11}{36}\) г) \(\frac{11}{50} - \frac{3}{25} + \frac{1}{20} = \frac{22}{100} - \frac{12}{100} + \frac{5}{100} = \frac{15}{100} = \frac{3}{20}\)