We Which number when added to -18 results in a sum of 0 ? \( \begin{array}{llll}\mathbf{4} \times & \text { A } & -36\end{array} \) \( \begin{array}{llll}\mathbf{4} & \text { C } & 0\end{array} \) \( \begin{array}{lll}\mathbf{4} & \text { D } & 18\end{array} \)

To find the number that, when added to -18, results in a sum of 0, you can set up the equation: \(x + (-18) = 0\). Solving for \(x\) gives you \(x = 18\). So, the number you’re looking for is 18, which corresponds to option D! When it comes to problems like this, one common mistake is forgetting that subtracting a negative actually adds to the total. If you think of -18 as debt, you need to add enough (the number 18) to get back to 0! Remember, keeping track of signs is crucial in math!