2. Выполнить деление: a)2$$\frac{1}{10}$$\colon1$$\frac{2}{5}$$\cdot6)4$$\frac{1}{2}$$\colon5$$\frac{1}{4}$$\cdot8$$\frac{3}{4}$$\colon5.

a)2$$\frac{1}{10}$$\colon1$$\frac{2}{5}$$ =$$\frac{21}{10}$$\colon$$\frac{7}{5}$$ =$$\frac{21}{10}$$\cdot$$\frac{5}{7}$$ =$$\frac{21\cdot5}{10\cdot7}$$ =$$\frac{3\cdot1}{2\cdot1}$$ =$$\frac{3}{2}$$ = 1$$\frac{1}{2}$$

б) 4$$\frac{1}{2}$$\colon5$$\frac{1}{4}$$ =$$\frac{9}{2}$$\colon$$\frac{21}{4}$$ =$$\frac{9}{2}$$\cdot$$\frac{4}{21}$$ =$$\frac{9\cdot4}{2\cdot21}$$ =$$\frac{3\cdot2}{1\cdot7}$$ =$$\frac{6}{7}$$

8$$\frac{3}{4}$$\colon5 =$$\frac{35}{4}$$\colon5 =$$\frac{35}{4}$$\cdot$$\frac{1}{5}$$ =$$\frac{35\cdot1}{4\cdot5}$$ =$$\frac{7\cdot1}{4\cdot1}$$ =$$\frac{7}{4}$$ = 1$$\frac{3}{4}$$

Ответ: a) 1$$\frac{1}{2}$$; б) 1$$\frac{3}{4}$$