b) $2\dfrac34\cdot(-0,4)-1\dfrac35\cdot2,75+(-1,2):\dfrac{4}{11}\\=\dfrac{11}{4}\cdot\dfrac{-2}{5}-\dfrac85\cdot\dfrac{11}{4}+\dfrac{-6}{5}\cdot\dfrac{11}{4}\\=\dfrac{11}{4}.\left(\dfrac{-2}{5}-\dfrac85+\dfrac{-6}{5}\right)\\=\dfrac{11}{4}\cdot\dfrac{-16}{5}\\=\dfrac{-44}{5}$
