вычислите (4/9+5/9)-4/6

[tex]( \frac{4}{9} + \frac{5}{9} ) - \frac{4}{6} = \frac{9}{9} - \frac{4}{6} = \frac{36}{36} - \frac{24}{36} = \frac{12}{36} = \frac{1}{3} [/tex]