Вычислите Й) $$3\frac{5}{6} - 1\frac{4}{9} = 2\frac{7}{18}$$

Й)

$$3\frac{5}{6} - 1\frac{4}{9} = (3-1) + (\frac{5}{6} - \frac{4}{9}) = 2 + (\frac{5 \times 3}{6 \times 3} - \frac{4 \times 2}{9 \times 2}) = 2 + (\frac{15}{18} - \frac{8}{18}) = 2 + \frac{15-8}{18} = 2 + \frac{7}{18} = 2\frac{7}{18}$$