Вариант №2 № 1 Образец: = 25 2.5 10 = 373-7 21 Решите: 1. 4.3 57 2. 1.5 87 3. 7.2 = 13 3 4. 10.2 = 11 5 5. 4 15 3

Решим примеры:

1. $$1.\ \frac{4}{5} \cdot \frac{3}{7} = \frac{4 \cdot 3}{5 \cdot 7} = \frac{12}{35}$$
2. $$2.\ \frac{1}{8} \cdot \frac{5}{7} = \frac{1 \cdot 5}{8 \cdot 7} = \frac{5}{56}$$
3. $$3.\ \frac{7}{13} \cdot \frac{2}{3} = \frac{7 \cdot 2}{13 \cdot 3} = \frac{14}{39}$$
4. $$4.\ \frac{10}{11} \cdot \frac{2}{5} = \frac{10 \cdot 2}{11 \cdot 5} = \frac{2 \cdot 2}{11 \cdot 1} = \frac{4}{11}$$
5. $$5.\ \frac{4}{15} \cdot \frac{1}{3} = \frac{4 \cdot 1}{15 \cdot 3} = \frac{4}{45}$$

Ответ:

1. $$\frac{12}{35}$$
2. $$\frac{5}{56}$$
3. $$\frac{14}{39}$$
4. $$\frac{4}{11}$$
5. $$\frac{4}{45}$$