The "sum" is the result of adding something together, and "digits" refers to the individual
numbers that make up 4399.
4399 has 4 digits. The digits in 4399 are 4, 3, 9, and 9.
When you are asking for the sum of the digits of 4399, you are basically asking what is
4 plus 3 plus 9 plus 9?
Therefore, the sum of the digits in 4399 is as follows:
4 + 3 + 9 + 9 = 25
Sum of digits in 4400
See if you can calculate the sum of the digits in the next number on our list before you go here.
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