l Digit Sum of 428
Enter Number

Answer
Digit Sum = 14
Reduced Digit Sum = 5

↓Steps Explained:↓



Calculate the digit sum of 428

Calculate the reduced digit sum of 428

Digit Sum

Add up 3 digits of 428:

Digit Sum → 4 + 2 + 8 = 14

Since our digit sum > 9:
repeat this process to get the reduced digit sum:
Our new number to evaluate is 14

Add up 2 digits of 14:

Digit Sum → 1 + 4 = 5

Since our digit sum ≤ 9:
we have our reduced digit sum

Final Answer

Digit Sum = 14
Reduced Digit Sum = 5

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