1. **State the problem:** Calculate the value of the expression $18 - 32$. 2. **Use the subtraction rule:** Subtracting a number is the same as adding its negative. 3. Rewrite the expression: $$18 - 32 = 18 + (-32)$$ 4. Perform the addition: $$18 + (-32) = -\cancel{(32 - 18)}14 = -14$$ 5. **Final answer:** $$18 - 32 = -14$$