The sum of $2 + 2$ is $4$.

Would you like to explore more details or have any questions about this?

Here are five related questions:

1. What is $2 + 3$?
2. How do you add two numbers together?
3. What is $5 + 5$?
4. Can you subtract 2 from 4?
5. What is the sum of $3 + 4$?

Tip: When adding numbers, try to visualize the problem using objects or a number line to make it easier to understand.