\(1\dfrac{1}{3}+\dfrac{1}{8}:\left(0,75-\dfrac{1}{2}\right)-25\%.\dfrac{1}{2}\)
\(=\dfrac{11}{8}+\dfrac{1}{8}:\left(\dfrac{3}{4}-\dfrac{1}{2}\right)-\dfrac{1}{4}.\dfrac{1}{2}\)
\(=\dfrac{11}{8}+\dfrac{1}{8}:\dfrac{1}{4}-\dfrac{1}{4}.\dfrac{1}{2}\)
\(=\dfrac{11}{8}+\dfrac{1}{2}-\dfrac{1}{8}=\dfrac{15}{8}-\dfrac{1}{8}=\dfrac{14}{8}=\dfrac{7}{4}\)
\(1\dfrac{3}{8}+\dfrac{1}{8}:\left(0,75-\dfrac{1}{2}\right)-25\%\cdot\dfrac{1}{2}\\ =\dfrac{11}{8}+\dfrac{1}{8}:\left(\dfrac{3}{4}-\dfrac{1}{2}\right)-\dfrac{1}{4}\cdot\dfrac{1}{2}\\ =\dfrac{11}{8}+\dfrac{1}{8}:\dfrac{1}{4}-\dfrac{1}{4}\cdot\dfrac{1}{2}\\ =\dfrac{11}{8}+\dfrac{1}{2}-\dfrac{1}{8}\\ =\dfrac{11}{8}+\dfrac{4}{8}-\dfrac{1}{8}\\ =\dfrac{11+4-1}{8}\\ =\dfrac{14}{8}\\ =\dfrac{7}{4}\)
