\(A=\left[\dfrac{5}{3}-\left(-\dfrac{1}{4}\right):1\dfrac{1}{5}\right]:\left(\dfrac{5}{8}+\dfrac{9}{4}\right)\)
\(=\left(\dfrac{5}{3}+\dfrac{1}{4}:\dfrac{6}{5}\right):\dfrac{23}{8}\)
\(=\left(\dfrac{5}{3}+\dfrac{5}{24}\right):\dfrac{23}{8}\)
\(=\dfrac{15}{8}:\dfrac{23}{8}\)
\(=\dfrac{15}{23}\)
\(B=1-\left\{1:\left[2+1:\left(1-\dfrac{1}{2}\right)\right]\right\}\)
\(=1-\left[1:\left(2+1:\dfrac{1}{2}\right)\right]\)
\(=1-\dfrac{1}{4}\)
\(=\dfrac{3}{4}\)
\(A=\left(\dfrac{5}{3}+\dfrac{1}{4}:\dfrac{6}{5}\right):\left(\dfrac{5}{8}+\dfrac{18}{8}\right)=\dfrac{15}{8}\cdot\dfrac{8}{23}=\dfrac{15}{23}\)
\(B=1-\left\{1:\left[2+1:\dfrac{1}{2}\right]\right\}=1-\left\{1:\left[2+2\right]\right\}=1-\dfrac{1}{4}=\dfrac{3}{4}\)
