\(a,15-2\dfrac{1}{3}:\left(\dfrac{4}{9}-\dfrac{1}{6}\right)\)
\(=15-2\dfrac{1}{3}:\left(\dfrac{8}{18}-\dfrac{3}{18}\right)\)
\(=15-2\dfrac{1}{3}:\dfrac{5}{18}\)
\(=15-\dfrac{7}{3}:\dfrac{5}{18}\)
\(=15-\dfrac{7}{3}.\dfrac{18}{5}\)
\(=15-7.\dfrac{6}{5}\)
\(=15-\dfrac{42}{5}\)
\(=\dfrac{33}{5}\)
\(b,0,1\left(6\right)+1,\left(3\right)\)
\(=\dfrac{3}{5}+3\)
\(=\dfrac{3}{5}+\dfrac{15}{5}\)
\(=\dfrac{18}{5}\)
\(c,1,\left(3\right)+0,1\left(2\right).2\dfrac{8}{11}\)
\(=3+\dfrac{1}{5}.\dfrac{30}{11}\)
\(=3+\dfrac{1}{1}.\dfrac{6}{11}\)
\(=3+\dfrac{6}{11}\)
\(=\dfrac{39}{11}\)
