算式 \dfrac{9}{22}+\dfrac{11}{18}-(\dfrac{23}{22}-\dfrac{7}{18}) 之值為何？
\dfrac{9}{22}+\dfrac{11}{18}-(\dfrac{23}{22}-\dfrac{7}{18})
\dfrac{4}{11}
\dfrac{9}{10}
\dfrac{1}{9}
\dfrac{5}{4}
