The "sum" is the result of adding something together, and "digits" refers to the individual
numbers that make up 45.
45 has 2 digits. The digits in 45 are 4 and 5.
When you are asking for the sum of the digits of 45, you are basically asking what is
4 plus 5?
Therefore, the sum of the digits in 45 is as follows:
4 + 5 = 9
Sum of digits in 46
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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