The "sum" is the result of adding something together, and "digits" refers to the individual
numbers that make up 9879.
9879 has 4 digits. The digits in 9879 are 9, 8, 7, and 9.
When you are asking for the sum of the digits of 9879, you are basically asking what is
9 plus 8 plus 7 plus 9?
Therefore, the sum of the digits in 9879 is as follows:
9 + 8 + 7 + 9 = 33
Sum of digits in 9880
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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