g: \(\left(\dfrac{8}{5}+\dfrac{2}{5}\right)\cdot\dfrac{5}{7}+\left(\dfrac{6}{5}+\dfrac{9}{5}\right)\cdot\dfrac{5}{7}\)
\(=\dfrac{10}{5}\cdot\dfrac{5}{7}+\dfrac{15}{5}\cdot\dfrac{5}{7}\)
\(=2\cdot\dfrac{5}{7}+3\cdot\dfrac{5}{7}=5\cdot\dfrac{5}{7}=\dfrac{25}{7}\)
h: \(\dfrac{4}{7}\cdot\dfrac{3}{5}\cdot\dfrac{7}{4}\cdot\left(-20\right)\cdot\dfrac{-11}{12}\)
\(=\dfrac{4}{7}\cdot\dfrac{7}{4}\cdot\dfrac{3}{5}\cdot20\cdot\dfrac{11}{12}\)
\(=12\cdot\dfrac{11}{12}=11\)
d: \(\dfrac{7}{13}\cdot\dfrac{5}{19}+\dfrac{7}{19}\cdot\dfrac{8}{13}-3\cdot\dfrac{7}{19}\)
\(=\dfrac{7}{19}\left(\dfrac{5}{13}+\dfrac{8}{13}\right)-3\cdot\dfrac{7}{19}\)
\(=\dfrac{7}{19}-3\cdot\dfrac{7}{19}=-2\cdot\dfrac{7}{19}=-\dfrac{14}{19}\)
e: \(\dfrac{-9}{16}\cdot\dfrac{13}{3}-\left(-\dfrac{3}{4}\right)\cdot\dfrac{19}{3}\)
\(=-3\cdot\dfrac{13}{16}+\dfrac{3}{4}\cdot\dfrac{19}{3}\)
\(=-\dfrac{39}{16}+\dfrac{19}{4}=\dfrac{-39+76}{16}=\dfrac{37}{16}\)
f: \(\dfrac{4}{7}\cdot\dfrac{3}{13}-\dfrac{-2}{7}\cdot\dfrac{3}{13}+\dfrac{1}{7}\cdot\dfrac{-3}{13}\)
\(=\dfrac{4}{7}\cdot\dfrac{3}{13}+\dfrac{2}{7}\cdot\dfrac{3}{13}-\dfrac{1}{7}\cdot\dfrac{3}{13}\)
\(=\dfrac{3}{13}\left(\dfrac{4}{7}+\dfrac{2}{7}-\dfrac{1}{7}\right)=\dfrac{3}{13}\cdot\dfrac{5}{7}=\dfrac{15}{91}\)
g: \(\dfrac{-1}{28}:\dfrac{1}{14}+\dfrac{3}{28}:\dfrac{3}{14}\)
\(=\dfrac{-1}{28}\cdot14+\dfrac{3}{28}\cdot\dfrac{14}{3}\)
\(=-\dfrac{1}{2}+\dfrac{1}{2}=0\)
