To rewrite the expression \( \frac{1}{2} \times 16 - s \) as another equivalent expression, we can simplify \( \frac{1}{2} \times 16 \).
Calculating the multiplication:
\[ \frac{1}{2} \times 16 = 8 \]
Now, substituting this back into the expression gives us:
\[ 8 - s \]
So, an equivalent expression is \( 8 - s \).