c, 13$\frac{1}{27}$ + 15$\frac{11}{18}$ + $\frac{7}{12}$
= (13+15) + ($\frac{1}{27}$ +$\frac{11}{18}$ + $\frac{7}{12}$ )
= 28 + ( $\frac{4}{108}$ + $\frac{66}{108}$+$\frac{63}{108}$)
= 28 + $\frac{4+66+63}{108}$
= 28+ $\frac{133}{108}$
= 28 + 1$\frac{25}{108}$
= 29$\frac{25}{108}$
d, 1 - $\frac{1}{2}$- $\frac{1}{3}$- $\frac{1}{6}$
= 1- ($\frac{1}{2}$+ $\frac{1}{3}$+ $\frac{1}{6}$)
=1 - ( $\frac{3}{6}$+ $\frac{2}{6}$ + $\frac{1}{6}$)
= 1 - $\frac{6}{6}$
= 1-1
= 0
