Respuesta:
[tex] \frac{71}{40} [/tex]
Explicación paso a paso:
[tex] \frac{2}{5} + \frac{3}{8} + \frac{1}{10 } = \\ \frac{2}{5} + \frac{3}{8} +1 \\ \frac{16 + 15 + 40}{40} = \frac{71}{40} [/tex]
