Сокращение дробей

a)

• $$\frac{4}{10} = \frac{2 \times 2}{2 \times 5} = \frac{2}{5}$$
• $$\frac{8}{12} = \frac{4 \times 2}{4 \times 3} = \frac{2}{3}$$
• $$\frac{6}{9} = \frac{3 \times 2}{3 \times 3} = \frac{2}{3}$$
• $$\frac{9}{12} = \frac{3 \times 3}{3 \times 4} = \frac{3}{4}$$

б)

• $$\frac{2}{8} = \frac{2 \times 1}{2 \times 4} = \frac{1}{4}$$
• $$\frac{3}{12} = \frac{3 \times 1}{3 \times 4} = \frac{1}{4}$$
• $$\frac{10}{2} = \frac{2 \times 5}{2 \times 1} = \frac{5}{1} = 5$$
• $$\frac{6}{30} = \frac{6 \times 1}{6 \times 5} = \frac{1}{5}$$