5.339 Выполните действие и сократите результат: a) \(\frac{3}{20} + \frac{7}{20}\); б) \(\frac{13}{15} - \frac{8}{15}\); в) \(\frac{9}{22} + \frac{2}{22}\); г) \(\frac{29}{36} - \frac{21}{36}\)

Решение:

a) \(\frac{3}{20} + \frac{7}{20} = \frac{3+7}{20} = \frac{10}{20} = \frac{1}{2}\)

б) \(\frac{13}{15} - \frac{8}{15} = \frac{13-8}{15} = \frac{5}{15} = \frac{1}{3}\)

в) \(\frac{9}{22} + \frac{2}{22} = \frac{9+2}{22} = \frac{11}{22} = \frac{1}{2}\)

г) \(\frac{29}{36} - \frac{21}{36} = \frac{29-21}{36} = \frac{8}{36} = \frac{2}{9}\)

Ответ: а) \(\frac{1}{2}\); б) \(\frac{1}{3}\); в) \(\frac{1}{2}\); г) \(\frac{2}{9}\)