The sum of $17 + 17 = 34$.

Would you like further assistance or details on calculations? Here are some questions that can deepen the discussion:

1. What are the properties of addition?
2. Can we represent this addition using a number line?
3. How does adding numbers relate to multiplication (e.g., $17 \times 2$)?
4. How can we use this sum in real-life applications?
5. Would you like to practice adding numbers in different bases, like binary or hexadecimal?

Tip: When adding large numbers mentally, breaking them into smaller parts (like tens and ones) can simplify the process.