[tex] \frac{1}{10} + \frac{6}{10} = \frac{7}{10} \\ \\ \frac{2}{10} + \frac{5}{10} = \frac{7}{10} \\ \\ \frac{3}{10} + \frac{4}{10} = \frac{7}{10} [/tex]
some fun
[tex] \frac{7}{10} = \frac{14}{20} \\ \\ \frac{9}{20} + \frac{5}{20} [/tex] [tex] \frac{14}{20} = \frac{7}{10} [/tex]
[tex] \frac{7}{10} = \frac{21}{30} \\ \\ \frac{8}{30} + \frac{13}{30} = \frac{21}{30} = \frac{7}{30} [/tex]
