Explicación paso a paso:
1.
[tex] - \frac{3}{5} + \frac{1}{5} + \frac{4}{5} = \frac{ - 3 + 1 + 4}{5} = \frac{ - 2 + 4}{5} = \frac{2}{5} [/tex]
2.
[tex]( - \frac{1}{2} + \frac{3}{2}) + \frac{1}{6} \\ \\ ( \frac{ - 1 + 3}{2}) + \frac{1}{6} \\ \\ \frac{2}{2} + \frac{1}{6} = 1 + \frac{1}{6} \\ \\ \frac{(1 \times 6) + (1 \times 1)}{1 \times 6} \\ \\ \frac{6 + 1}{6} = \frac{7}{6} [/tex]
3.
[tex] - 1 + \frac{1}{4} \\ \\ \frac{( - 1 \times 4) + (1 \times 1)}{(1 \times 4)} = \frac{ - 4 + 1}{4} = - \frac{3}{4} [/tex]
4.
[tex] \frac{3}{5} - ( - \frac{1}{5}) \\ \\ \frac{3}{5} + \frac{1}{5} = \frac{3 + 1}{5} = \frac{4}{5} [/tex]
