The sum of 23 and 56 is:

$23 + 56 = 79$

Do you need further explanation or help with anything else?

Here are 5 related questions:

1. What is 79 minus 23?
2. How do you add two-digit numbers?
3. What is the sum of 56 and 79?
4. Can you subtract 56 from 79?
5. What is the difference between 23 and 56?

Tip: When adding numbers, line them up by place value to make sure each digit is correctly added (ones with ones, tens with tens, etc.).