Question

$\frac{1}{7} + \frac{1}{8} = \frac{7 + 8}{56} = \frac{15}{56} \ \\ \frac{7}{13} + \frac{5}{10} = \frac{70 + 65}{130} = \frac{135}{130} \\ \frac{7}{5} - \frac{1}{3} = \frac{21 - 5}{15} = \frac{16}{15} \\ \frac{8}{7} - \frac{9}{11} = \frac{88 - 63}{77} = \frac{25}{77}$
no se si esta bien​

Answer 1

Respuesta:

no entiendo^^

Explicación paso a paso:

Kahskjas