a) \( \frac{2}{3} + \frac{3}{4} = \frac{8}{12} + \frac{9}{12} = \frac{17}{12} \)
б) \( \frac{2}{15} + \frac{7}{10} = \frac{4}{30} + \frac{21}{30} = \frac{25}{30} \)
в) \( \frac{3}{16} + \frac{9}{20} = \frac{15}{80} + \frac{36}{80} = \frac{51}{80} \)
г) \( \frac{1}{2} - \frac{1}{3} = \frac{3}{6} - \frac{2}{6} = \frac{1}{6} \)
д) \( \frac{11}{36} - \frac{5}{18} = \frac{11}{36} - \frac{10}{36} = \frac{1}{36} \)
е) \( \frac{9}{10} - \frac{7}{8} = \frac{36}{40} - \frac{35}{40} = \frac{1}{40} \)
a) \( \frac{17}{12} \)
б) \( \frac{25}{30} \)
в) \( \frac{51}{80} \)
г) \( \frac{1}{6} \)
д) \( \frac{1}{36} \)
е) \( \frac{1}{40} \)