Вариант №3 № 1 Образец: = 25 2.5 10 = 37 3.7 21 Решите: 1. 7. 2 2. 2.9 3. 10.2 5 4. 11. 1 5. 2.10

Решим примеры:

1. $$1.\ \frac{7}{5} \cdot \frac{2}{7} = \frac{7 \cdot 2}{5 \cdot 7} = \frac{2}{5}$$
2. $$2.\ \frac{2}{7} \cdot \frac{9}{6} = \frac{2 \cdot 9}{7 \cdot 6} = \frac{1 \cdot 3}{7 \cdot 1} = \frac{3}{7}$$
3. $$3.\ \frac{10}{11} \cdot \frac{2}{9} = \frac{10 \cdot 2}{11 \cdot 9} = \frac{20}{99}$$
4. $$4.\ \frac{11}{3} \cdot \frac{1}{7} = \frac{11 \cdot 1}{3 \cdot 7} = \frac{11}{21}$$
5. $$5.\ \frac{2}{7} \cdot \frac{10}{5} = \frac{2 \cdot 10}{7 \cdot 5} = \frac{2 \cdot 2}{7 \cdot 1} = \frac{4}{7}$$

Ответ:

1. $$\frac{2}{5}$$
2. $$\frac{3}{7}$$
3. $$\frac{20}{99}$$
4. $$\frac{11}{21}$$
5. $$\frac{4}{7}$$