Worksheets Crafter: Digit addition is a math operation where you combine two or more numbers together to find the total sum. When you add numbers, you are putting them together to see how much you have in all. For example, if you have the numbers 3 and 4, you can add them together to get the answer 7. When adding digits, it is important to write the numbers in a column so you can easily line up the digits to add them correctly. Practice your digit addition skills by adding numbers together and see how quickly you can find the total sum!