2 3 — = 5 4 1 2 — = 7 3 4 6 — = 5 5 1 7 — = 8 9 2 6 — = 3 7 5 4 — = 6 10 11 7 — = 14 22 4 5 — = 15 8 3 2 — = 10 6 17 11 — = 33 34

Выполним действия с дробями:

1. $$\frac{2}{5} \cdot \frac{3}{4} = \frac{2 \cdot 3}{5 \cdot 4} = \frac{6}{20} = \frac{3}{10}$$
2. $$\frac{1}{7} \cdot \frac{2}{3} = \frac{1 \cdot 2}{7 \cdot 3} = \frac{2}{21}$$
3. $$\frac{4}{5} \cdot \frac{6}{5} = \frac{4 \cdot 6}{5 \cdot 5} = \frac{24}{25}$$
4. $$\frac{1}{8} \cdot \frac{7}{9} = \frac{1 \cdot 7}{8 \cdot 9} = \frac{7}{72}$$
5. $$\frac{2}{3} \cdot \frac{6}{7} = \frac{2 \cdot 6}{3 \cdot 7} = \frac{12}{21} = \frac{4}{7}$$
6. $$\frac{5}{6} \cdot \frac{4}{10} = \frac{5 \cdot 4}{6 \cdot 10} = \frac{20}{60} = \frac{1}{3}$$
7. $$\frac{11}{14} \cdot \frac{7}{22} = \frac{11 \cdot 7}{14 \cdot 22} = \frac{77}{308} = \frac{1}{4}$$
8. $$\frac{4}{15} \cdot \frac{5}{8} = \frac{4 \cdot 5}{15 \cdot 8} = \frac{20}{120} = \frac{1}{6}$$
9. $$\frac{3}{10} \cdot \frac{2}{6} = \frac{3 \cdot 2}{10 \cdot 6} = \frac{6}{60} = \frac{1}{10}$$
10. $$\frac{17}{33} \cdot \frac{11}{34} = \frac{17 \cdot 11}{33 \cdot 34} = \frac{187}{1122} = \frac{1}{6}$$

Ответ: Выше приведены решения.