$$2\frac{2}{5} = \frac{2 \times 5 + 2}{5} = \frac{10 + 2}{5} = \frac{12}{5}$$
$$1\frac{2}{3} = \frac{1 \times 3 + 2}{3} = \frac{3 + 2}{3} = \frac{5}{3}$$
$$\frac{12}{5} \times \frac{5}{3} = \frac{12 \times 5}{5 \times 3} = \frac{60}{15} = 4$$
Ответ: 1) Да