a)
[tex] \frac{1}{3} + \frac{5}{2} = \frac{2 + 15}{6} = \: \frac{17}{6} [/tex]
b)
[tex] \frac{4}{7} - \frac{8}{10} = \frac{40 - 63}{70} = \frac{ - 23 }{70} [/tex]
c)
[tex] \frac{2}{5} + \frac{3}{6} = \frac{12 + 15}{30} = \frac{ {27}^{ \div 3} }{ {30}^{ \div 3} } = \frac{7}{10} [/tex]
d)
[tex] \frac{6}{7} - \frac{9}{7} = \frac{ - 3}{7} [/tex]
e)
[tex] \frac{3}{10} + \frac{4}{2} = \frac{3 + 20}{10} = \frac{23}{10} [/tex]
f)
[tex] \frac{4}{9} - \frac{8}{6} = \frac{8 - 24}{18} = \frac{ - 16}{18} [/tex]
