The sum of $89 + 98$ is $187$.

Would you like more details or have any questions? Here are 5 questions you might want to ask:

1. How do you solve for the sum of multiple numbers?
2. What are the properties of addition?
3. How do you perform addition with large numbers?
4. What is the difference between addition and subtraction?
5. Can you explain the associative property of addition?

Tip: When adding large numbers, it can be helpful to line up the digits by place value to ensure accuracy.