The "sum" is the result of adding something together, and "digits" refers to the individual
numbers that make up 8471.
8471 has 4 digits. The digits in 8471 are 8, 4, 7, and 1.
When you are asking for the sum of the digits of 8471, you are basically asking what is
8 plus 4 plus 7 plus 1?
Therefore, the sum of the digits in 8471 is as follows:
8 + 4 + 7 + 1 = 20
Sum of digits in 8472
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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