Question

um quarto+cinco oitavos= ?

Answer 1

1 + 5 =     2 + 5   =  7
4    8           8          8

mmc de 4 e 8: 8

Answer 2

$\frac{1}{4} + \frac{5}{8} = \frac{2+5}{8} = \frac{7}{8}$