2. Запиши две дроби, равные данным: a) \frac{1}{5} = б) \frac{2}{8} = в) \frac{3}{12} = г) \frac{4}{20} = д) \frac{5}{25} = e) \frac{1}{15} =

a) $$\frac{1}{5} = \frac{1 \cdot 2}{5 \cdot 2} = \frac{2}{10}$$, $$\frac{1}{5} = \frac{1 \cdot 6}{5 \cdot 6} = \frac{6}{30}$$

б) $$\frac{2}{8} = \frac{2 \cdot 2}{8 \cdot 2} = \frac{4}{16}$$, $$\frac{2}{8} = \frac{2 \div 2}{8 \div 2} = \frac{1}{4}$$

в) $$\frac{3}{12} = \frac{3 \cdot 2}{12 \cdot 2} = \frac{6}{24}$$, $$\frac{3}{12} = \frac{3 \cdot 4}{12 \cdot 4} = \frac{12}{48}$$

г) $$\frac{4}{20} = \frac{4 \cdot 2}{20 \cdot 2} = \frac{8}{40}$$, $$\frac{4}{20} = \frac{4 \div 4}{20 \div 4} = \frac{1}{5}$$

д) $$\frac{5}{25} = \frac{5 \cdot 2}{25 \cdot 2} = \frac{10}{50}$$, $$\frac{5}{25} = \frac{5 \div 5}{25 \div 5} = \frac{1}{5}$$

e) $$\frac{1}{15} = \frac{1 \cdot 2}{15 \cdot 2} = \frac{2}{30}$$, $$\frac{1}{15} = \frac{1 \cdot 4}{15 \cdot 4} = \frac{4}{60}$$

Ответ: a) $$\frac{2}{10}$$, $$\frac{6}{30}$$; б) $$\frac{4}{16}$$, $$\frac{1}{4}$$; в) $$\frac{6}{24}$$, $$\frac{12}{48}$$; г) $$\frac{8}{40}$$, $$\frac{1}{5}$$; д) $$\frac{10}{50}$$, $$\frac{1}{5}$$; е) $$\frac{2}{30}$$, $$\frac{4}{60}$$