2.251 Найдите разность: e) $$11\frac{7}{31} - 9\frac{11}{64}$$

e) $$11\frac{7}{31} - 9\frac{11}{64} = (11-9) + (\frac{7}{31} - \frac{11}{64}) = 2 + (\frac{7\cdot64}{31\cdot64} - \frac{11\cdot31}{64\cdot31}) = 2 + (\frac{448}{1984} - \frac{341}{1984}) = 2 + \frac{448-341}{1984} = 2 + \frac{107}{1984} = 2\frac{107}{1984}$$

Ответ: $$2\frac{107}{1984}$$