д) ㅍ) 8-3 =

д) $$8\frac{2}{7} - 3\frac{4}{7} = (8-3) + (\frac{2}{7} - \frac{4}{7}) = 5 + (\frac{2}{7} - \frac{4}{7}) = 5 - \frac{2}{7} = 4\frac{7}{7} - \frac{2}{7} = 4\frac{5}{7}$$

Ответ: $$4\frac{5}{7}$$