a)
[tex] \frac{1}{18} + \frac{1}{9} + \frac{1}{6} [/tex]
[tex] \frac{1 + 2 + 3}{18} [/tex]
[tex] \frac{6}{18} [/tex]
[tex] \frac{1}{ 3} [/tex]
b)
[tex] \frac{7}{36} - \frac{1}{18} + \frac{3}{4} [/tex]
[tex] \frac{7 - 2 + 27}{36} [/tex]
[tex] \frac{32}{36} [/tex]
[tex] \frac{8}{9} [/tex]
c)
[tex] \frac{37}{18} - \frac{3}{4} - \frac{5}{6} [/tex]
[tex] \frac{17}{36} [/tex]
