$2 + 2 = 4$.

Would you like more details on basic addition or related concepts?

Here are some related questions:

1. What is $3 + 5$?
2. How does addition work with larger numbers?
3. How does addition differ from subtraction?
4. What are some examples of addition in real life?
5. How can we use addition with negative numbers?

Tip: Addition is the foundation of many other operations, like multiplication. Practicing with small numbers helps reinforce understanding!