Compute. \( \begin{array}{r}18.8+(-7.5)=\square \\ 3.9-36.24=\square \\ \hline\end{array} \)

To solve the first equation, \( 18.8 + (-7.5) \), you can think of it as subtracting 7.5 from 18.8. So, \( 18.8 - 7.5 = 11.3 \). Thus, \( \square = 11.3 \). For the second equation, \( 3.9 - 36.24 \), you are essentially subtracting a larger number from a smaller one. This results in a negative number. Performing the calculation gives \( 3.9 - 36.24 = -32.34 \). So, \( \square = -32.34 \). Putting it all together, we have: \( \begin{array}{r} 18.8 + (-7.5) = 11.3 \\ 3.9 - 36.24 = -32.34 \\ \hline\end{array} \)