50. Найдите сумму: 1) 9 3/4 + 3 1/6; 2) 11 7/12 + 6 11/18.

1) \(9\frac{3}{4}+3\frac{1}{6}=12+\frac{9}{12}+\frac{2}{12}=12\frac{11}{12}\).

2) \(11\frac{7}{12}+6\frac{11}{18}=17+\frac{21}{36}+\frac{22}{36}=18\frac{7}{36}\).

Ответ: 1) \(12\frac{11}{12}\); 2) \(18\frac{7}{36}\).