Let's solve the expression step by step:

\[
(-5) + (+13) - (-9) - (+18)
\]

### Step 1: Remove parentheses
- \((-5)\) stays as \(-5\).
- \((+13)\) stays as \(+13\).
- \(-(-9)\) becomes \(+9\) (since subtracting a negative is the same as adding).
- \(-(+18)\) stays as \(-18\).

The expression now looks like this:

\[
-5 + 13 + 9 - 18
\]

### Step 2: Perform the operations from left to right
- First, \( -5 + 13 = 8 \)
- Then, \( 8 + 9 = 17 \)
- Finally, \( 17 - 18 = -1 \)

### Final Answer: 
\[
-1
\]

Would you like more details or have any questions?

Here are 5 related questions to consider:
1. How do you handle multiple negative signs in an expression?
2. What is the order of operations when solving more complex expressions?
3. How does adding and subtracting positive and negative numbers work?
4. What happens when you subtract a negative number from a positive number?
5. How can parentheses impact calculations in mathematical expressions?

**Tip:** Always simplify expressions by removing parentheses first, especially when dealing with signs.

Learn how to solve the arithmetic expression (-5) + (+13) - (-9) - (+18) step-by-step. Understand key concepts like handling negative numbers and applying the order of operations. Suitable for students in Grades 5-7.

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