Ответ:\(\frac{14}{88}+\frac{7}{22}=\frac{7}{44}+\frac{14}{44}=\frac{21}{44}\).\(\frac{10}{81}+\frac{8}{81}=\frac{18}{81}=\frac29\).Ответ: а) \(\frac{21}{44}\); б) \(\frac29\).