The "sum" is the result of adding something together, and "digits" refers to the individual
numbers that make up 153.
153 has 3 digits. The digits in 153 are 1, 5, and 3.
When you are asking for the sum of the digits of 153, you are basically asking what is
1 plus 5 plus 3?
Therefore, the sum of the digits in 153 is as follows:
1 + 5 + 3 = 9
Sum of digits in 154
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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