如何计算Sum of Digits

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A digit sum calculator adds together all the individual digits of a number. The sum of digits of 12345 is 1+2+3+4+5 = 15. Digit sums are used in divisibility rules (a number is divisible by 9 if its digit sum is divisible by 9), check digit algorithms, and computing digital roots.

公式

分步指南

1. 1Separate the number into individual digits
2. 2Add all digits together
3. 3The result is the digit sum

例题解析

常见错误注意事项

• ✕Including the decimal point in multi-digit sums
• ✕Forgetting negative signs don't affect digit sums