Question

Write the usefulness of Digit sums.​

Answer 1

Answer:

Digit sums and digital roots can be used for quick divisibility tests: a natural number is divisible by 3 or 9 if and only if its digit sum (or digital root) is divisible by 3 or 9, respectively. ... Digit sums are also a common ingredient in checksum algorithms to check the arithmetic operations of early computers.

Answer 2

Answer:

The digit sum of a number is the total of all of its digits. For instance, 1 + 7 equals 8, so the digit sum is 8.

Step-by-step explanation:

• The digit sum is what is left behind after adding the digits repeatedly until a single digit answer is found.
• The result of adding all the digits to a number is its "Digit Sum," which is the sum of all the digits up to the point where there is only one digit between 1 and 9 left.
• To verify solutions incorporating many mathematical operations, such as multiplication, division, addition, subtraction, squares, square roots, cube roots, etc., utilize the digit-sum approach
• Digit sum method is also referred to as the add-up method.

Digit sum method uses:

The major concept of digit sum used in problem solving includes

• Quick calculations checks while multiplying numbers.
• Calculating the sum of a number that has been raised in power.
• Figuring out whether a given integer is a perfect square or not.

Final answer:

The addition of a number's digits without taking into account place values yields the digit sum.

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