\(4,\dfrac{2}{7}\cdot\dfrac{3}{11}+\dfrac{2}{7}\cdot\dfrac{8}{11}=\dfrac{2}{7}\)
\(5,-12+\left(16-11\right)\cdot4=-12+20=8\)
\(6,2\dfrac{3}{7}+1\dfrac{4}{7}=\dfrac{17}{7}+\dfrac{11}{7}=\dfrac{28}{7}=4\)
\(7,\dfrac{-2}{3}\cdot\dfrac{4}{5}+\dfrac{1}{5}:\dfrac{9}{11}=\dfrac{-8}{15}+\dfrac{11}{45}=-\dfrac{13}{45}\)
\(\dfrac{2}{7}.\dfrac{3}{11}+\dfrac{2}{7}.\dfrac{8}{11}=\dfrac{2}{7}.\left(\dfrac{3}{11}+\dfrac{8}{11}\right)=\dfrac{2}{7}.1=\dfrac{2}{7}\)
\(-12+\left(16-11\right).4=-12+5.4=-12+20=8\)
\(2\dfrac{3}{7}+1\dfrac{4}{7}=\dfrac{17}{7}+\dfrac{11}{7}=\dfrac{28}{7}=4\)
\(\dfrac{-2}{3}.\dfrac{4}{5}+\dfrac{1}{5}:\dfrac{9}{11}=\dfrac{-8}{15}+\dfrac{11}{45}=\dfrac{-13}{45}\)
