Решите примеры на сложение:

a) \(\frac{2}{5} + \frac{1}{5} = \frac{2+1}{5} = \frac{3}{5}\) б) \(3 + \frac{2}{5} = 3\frac{2}{5}\) в) \(3\frac{2}{5} + 1 = 4\frac{2}{5}\) г) \(3\frac{2}{5} + \frac{1}{5} = 3\frac{2+1}{5} = 3\frac{3}{5}\) д) \(3\frac{2}{5} + 1\frac{1}{5} = (3+1) + (\frac{2}{5} + \frac{1}{5}) = 4 + \frac{3}{5} = 4\frac{3}{5}\) е) \(3\frac{2}{5} + 1\frac{3}{5} = (3+1) + (\frac{2}{5} + \frac{3}{5}) = 4 + \frac{5}{5} = 4 + 1 = 5\)