8) $$10\frac{7}{16} - 4\frac{12}{16}$$;

Так как $$\frac{7}{16} < \frac{12}{16}$$, преобразуем первое число: $$10\frac{7}{16} = 9 + 1\frac{7}{16} = 9 + \frac{16}{16} + \frac{7}{16} = 9\frac{23}{16}$$. Тогда, $$9\frac{23}{16} - 4\frac{12}{16} = (9-4) + (\frac{23}{16} - \frac{12}{16}) = 5 + \frac{23-12}{16} = 5 + \frac{11}{16} = 5\frac{11}{16}$$ Ответ: $$5\frac{11}{16}$$