a) \(\dfrac{2}{9}+\dfrac{5}{7}\times\dfrac{14}{3}=\dfrac{2}{9}+\dfrac{5}{1}\times\dfrac{2}{3}=\dfrac{2}{9}+\dfrac{10}{3}=\dfrac{2}{9}+\dfrac{30}{9}=\dfrac{32}{9}\)
b) \(\dfrac{6}{5}:\dfrac{3}{4}+\dfrac{3}{8}\times2=\dfrac{6}{5}\times\dfrac{4}{3}+\dfrac{6}{8}=\dfrac{2}{5}\times\dfrac{4}{1}+\dfrac{3}{4}=\dfrac{8}{5}+\dfrac{3}{4}=\dfrac{32}{20}+\dfrac{15}{20}=\dfrac{47}{20}\)
c) \(\dfrac{7}{2}+\dfrac{6}{7}:3=\dfrac{7}{2}+\dfrac{6}{7}\times\dfrac{1}{3}=\dfrac{7}{2}+\dfrac{2}{7}=\dfrac{49}{14}+\dfrac{4}{14}=\dfrac{53}{14}\)
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