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

Would you like any further details or have any questions?

Here are 5 related questions:

1. What is $2 \times 2$?
2. How do you subtract 2 from 4?
3. What is the square of 2?
4. Can you find the result of $2 + 2 \times 2$?
5. What is $2^2$?

Tip: Remember, multiplication and division are performed before addition and subtraction in mathematical expressions.