The "sum" is the result of adding something together, and "digits" refers to the individual
numbers that make up 7455.
7455 has 4 digits. The digits in 7455 are 7, 4, 5, and 5.
When you are asking for the sum of the digits of 7455, you are basically asking what is
7 plus 4 plus 5 plus 5?
Therefore, the sum of the digits in 7455 is as follows:
7 + 4 + 5 + 5 = 21
Sum of digits in 7456
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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