Math Problem Solver

\[ \frac{-1}{2} + 3 = \frac{5}{2} = 2.5 \]

The sum can be computed by rewriting each term over a common denominator, where the least common denominator of \(\frac{-1}{2}\) and \(\frac{3}{1}\) is \(2\). \[ \begin{aligned} \frac{-1}{2} + 3 &= \frac{-1 \cdot 1}{2 \cdot 1} + \frac{3 \cdot 2}{1 \cdot 2} \\ &= \frac{-1 + 6}{2} \\ &= \frac{5}{2} \end{aligned} \]