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. $$\begin{array} { r r }
- & 16 \
- & 11 \
\hline
\end{array}$$
A) -27
B) -20
C) -24
D) -32
E) -29

Question

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. $$\begin{array} { r r } 
- & 16 \
- & 11 \
\hline
\end{array}$$
A) -27
B) -20
C) -24
D) -32
E) -29

Quizplus · Accepted Answer

When adding numbers vertically, you align them by their rightmost digits. Here, you're adding -16 and -11. The sum of -16 and -11 is -27, because when you add two negative numbers, you add their absolute values and keep the negative sign.

The Horizontal Format Is Used Extensively in Algebra, but Occasionally −16−11\begin{array} { r r } - & 16 \\- & 11 \\\hline\end{array}−−​1611​​

The Horizontal Format Is Used Extensively in Algebra, but Occasionally $\begin{array} { r r } - & 16 \\- & 11 \\\hline\end{array}$