The sum of $4 + 4$ is $8$.

Would you like to explore any details or ask questions about this? Here are some related questions to consider:

1. What is the sum of $4 + 8$?
2. What is $4 + 4 + 4$?
3. How does the commutative property apply to addition?
4. Can you express $4 \times 2$ as an addition?
5. What is the difference between $4 + 4$ and $8 + 8$?

Tip: Remember, addition is both commutative and associative, which means you can change the order of numbers or group them differently, and the sum will remain the same!