The sum of $1 + 1$ is $2$.

Would you like any details or have any questions about this calculation?

Here are 5 numbered questions you might want to ask:

1. How do you solve a quadratic equation?
2. What is the derivative of $x^2$?
3. How do you calculate the area of a circle?
4. What is the Pythagorean theorem?
5. How do you simplify algebraic expressions?

Tip: Always double-check your calculations to avoid simple arithmetic errors.