Выполним действия:
- a) 1$$\frac{3}{7}$$:$$\frac{8}{4}$$ = $$\frac{10}{7}$$ : $$\frac{8}{4}$$ = $$\frac{10}{7}$$\cdot$$\frac{4}{8}$$ = $$\frac{10}{7}$$\cdot$$\frac{1}{2}$$ = $$\frac{5}{7}$$
- б) 3$$\frac{3}{5}$$:2$$\frac{1}{10}$$ = $$\frac{18}{5}$$ : $$\frac{21}{10}$$ = $$\frac{18}{5}$$\cdot$$\frac{10}{21}$$ = $$\frac{6}{1}$$\cdot$$\frac{2}{7}$$ = $$\frac{12}{7}$$ = 1$$\frac{5}{7}$$
- в) 4$$\frac{3}{7}$$:1$$\frac{5}{7}$$ = $$\frac{31}{7}$$ : $$\frac{12}{7}$$ = $$\frac{31}{7}$$\cdot$$\frac{7}{12}$$ = $$\frac{31}{12}$$ = 2$$\frac{7}{12}$$
Ответ: а) $$\frac{5}{7}$$; б) 1$$\frac{5}{7}$$; в) 2$$\frac{7}{12}$$