[tex]a) \frac{1}{4} + \frac{1}{2} = \frac{3}{4}\\[/tex]
[tex]b) \frac{3}{4} + \frac{1}{8} = \frac{7}{8}[/tex]
[tex]c) \frac{5}{8} + \frac{1}{4} = \frac{7}{8}[/tex]
[tex]d) \frac{2}{3} + \frac{8}{12} = 1 \frac{4}{12}[/tex]
