To calculate \(-4.1 - 9.4\), you can treat it as adding negative numbers:
\[ -4.1 - 9.4 = -4.1 + (-9.4) \]
Now, add the absolute values:
\[ 4.1 + 9.4 = 13.5 \]
Since both numbers are negative, the final result is:
\[ -13.5 \]
So, \(-4.1 - 9.4 = -13.5\).