[tex] \frac{23}{8} + \frac{1}{4} = \frac{23}{8} + \frac{2}{8} = \frac{23 + 2}{8} = \frac{25}{8} [/tex]
[tex] \frac{21}{2} + \frac{11}{8} = \frac{84}{8} + \frac{11}{8} = \frac{84 + 11}{8} = \frac{95}{8} [/tex]
[tex] \frac{7}{5} + \frac{7}{10} = \frac{14}{10} + \frac{7}{10} = \frac{14 + 7}{10} = \frac{21}{10} [/tex]
[tex] \frac{7}{4} + \frac{15}{2} = \frac{7}{4} + \frac{30}{4} = \frac{7 + 30}{4} = \frac{37}{4} [/tex]
