Решение:

а) $$\frac{6}{10} = \frac{3}{5}$$, $$\frac{6}{18} = \frac{1}{3}$$, $$\frac{9}{15} = \frac{3}{5}$$, $$\frac{9}{24} = \frac{3}{8}$$

б) $$\frac{2}{12} = \frac{1}{6}$$, $$\frac{3}{15} = \frac{1}{5}$$, $$\frac{30}{60} = \frac{1}{2}$$, $$\frac{7}{42} = \frac{1}{6}$$

в) $$\frac{12}{60} = \frac{1}{5}$$, $$\frac{99}{22} = \frac{9}{2}$$, $$\frac{5}{100} = \frac{1}{20}$$, $$\frac{20}{1000} = \frac{1}{50}$$

Ответ:

• а) $$\frac{3}{5}$$, $$\frac{1}{3}$$, $$\frac{3}{5}$$, $$\frac{3}{8}$$
• б) $$\frac{1}{6}$$, $$\frac{1}{5}$$, $$\frac{1}{2}$$, $$\frac{1}{6}$$
• в) $$\frac{1}{5}$$, $$\frac{9}{2}$$, $$\frac{1}{20}$$, $$\frac{1}{50}$$