2. Сравните дроби: 5 3 4 3 а) - и - : б) - и 1- 8 4 9 8

• а) $$\frac{5}{8}$$ и $$\frac{3}{4}$$ $$\frac{3}{4} = \frac{3 \cdot 2}{4 \cdot 2} = \frac{6}{8}$$ $$\frac{5}{8} < \frac{6}{8}$$ $$\frac{5}{8} < \frac{3}{4}$$
• б) $$\frac{4}{9}$$ и $$\frac{3}{8}$$ $$\frac{4}{9} = \frac{4 \cdot 8}{9 \cdot 8} = \frac{32}{72}$$ $$\frac{3}{8} = \frac{3 \cdot 9}{8 \cdot 9} = \frac{27}{72}$$ $$\frac{32}{72} > \frac{27}{72}$$ $$\frac{4}{9} > \frac{3}{8}$$

Ответ: а) $$\frac{5}{8} < \frac{3}{4}$$; б) $$\frac{4}{9} > \frac{3}{8}$$