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

Would you like more details or have any other questions?

Here are five related questions:

1. What is $2 + 3$?
2. How do you add two negative numbers?
3. What is $5 \times 2$?
4. Can you explain the concept of addition in basic math?
5. How do you solve $2x + 2 = 6$?

Tip: When adding numbers, the order doesn't matter due to the commutative property of addition.