Answer
To add two numbers with the same sign, add the values. Then copy their common sign.
Work Step by Step
To add two numbers with the same sign, add the values. Then copy their common sign. For example,
\begin{array}{l}\require{cancel}
-5+(-6)
\\=
-(5+6)
\text{ (add the numbers)}
\\=
-(11)
\\=
-11
\text{ (copy their common sign)}
\\\\
3+5
\\=
+(3+5)
\text{ (add the numbers)}
\\=
+(8)
\\=
8
\text{ (copy their common sign)}
.\end{array}
