The Horizontal Format Is Used Extensively in Algebra, but Occasionally $$\begin{array} { r } - \quad 13 \\- \quad 19 \\\hline\end{array}$$

Short Answer

The horizontal format is used extensively in algebra, but occasionally the vertical format shows up. You should therefore have some exposure to the vertical format. Find the sum. $$\begin{array} { r } - \quad 13 \\- \quad 19 \\\hline\end{array}$$