The "sum" is the result of adding something together, and "digits" refers to the individual
numbers that make up 688.
688 has 3 digits. The digits in 688 are 6, 8, and 8.
When you are asking for the sum of the digits of 688, you are basically asking what is
6 plus 8 plus 8?
Therefore, the sum of the digits in 688 is as follows:
6 + 8 + 8 = 22
Sum of digits in 689
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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