\(0,3-\dfrac{8}{3}\div\dfrac{4}{3}.\dfrac{1}{5}+1=0,3-2.\dfrac{1}{5}+1=0,3-\dfrac{2}{5}+1=-\dfrac{1}{10}+1=\dfrac{9}{10}\)
\(\left(-\dfrac{1}{2}\right)^2-\dfrac{5}{8}\div\left(0,5\right)^3-\dfrac{5}{3}.\left(-6\right)=\dfrac{1}{4}-\dfrac{5}{8}\div\dfrac{1}{8}-\dfrac{5}{3}.\left(-6\right)=\dfrac{1}{4}-5--10=\dfrac{21}{4}\)
\(2+4\div\left(\dfrac{2}{3}-\dfrac{1}{6}\right).\left(-2,25\right)=2+4\div\dfrac{1}{2}.\left(-2,25\right)=2+8.\left(-2,25\right)=2+18=20\)
\(\left(2\dfrac{5}{6}+1\dfrac{4}{9}\right)\div\left(10\dfrac{1}{12}-9\dfrac{1}{2}\right)=\left(\dfrac{17}{6}+\dfrac{13}{9}\right)\div\left(\dfrac{121}{12}-\dfrac{19}{2}\right)=\dfrac{77}{18}\div\dfrac{7}{12}=\dfrac{22}{3}\)
