Answer
$\dfrac{3}{4}$
Work Step by Step
The given expression, $
\dfrac{1}{2}-\left(-\dfrac{1}{4}\right)
$, simplifies to
\begin{array}{l}\require{cancel}
\dfrac{1}{2}+\dfrac{1}{4}
\\\\=
\dfrac{2(1)+1(1)}{4}
\\\\=
\dfrac{2+1}{4}
\\\\=
\dfrac{3}{4}
.\end{array}
