[tex] \frac{1}{3} \times (1 - \frac{2}{5} ) + \frac{4}{5} = \\ \frac{1}{3} \times ( ^{5)} 1 - \frac{2}{5} ) + \frac{4}{5} = \\ \frac{1}{3} \times ( \frac{5}{5} - \frac{2}{5} ) + \frac{4}{5} = \\ \frac{1}{3} \times \frac{3}{5} + \frac{4}{5} = \\ \frac{1}{5} + \frac{4}{5} = \frac{5}{5} = 1[/tex]
# Gogoașa Ucigașă :-)
