Ответ:\(4\frac{5}{9}+7\frac{1}{6}=11+\frac{10}{18}+\frac{3}{18}=11\frac{13}{18}\).\(6\frac{11}{12}+8\frac{13}{18}=14+\frac{33}{36}+\frac{26}{36}=14\frac{59}{36}=15\frac{23}{36}\).