$1 + 1 = 2$.

Would you like more details or have any questions? Here are some related questions:

1. What is $2 + 2$?
2. How do you add two numbers?
3. What is the sum of $1 + 2$?
4. How does addition work with larger numbers?
5. Can you explain what addition is?

Tip: Addition is one of the basic arithmetic operations, used to calculate the total of two or more numbers.