0
It is called the digital sum. If you keep doing it until you reach a single digit answer, it is called a digital root. The term digital root is sometimes also used for the digital sum.
For example,
3042 gives the digital sum of 3+0+4+2 = 9 which is also its digital root.
but
3047 gives the digital sum of 3+0+4+7 = 14 and the digital root is 1+4 = 5.
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What is the way of writing a number as the sum of the values of its digits?
They are called the digital roots.
What is the value of the digits in the number 0.303?
The different digits have different values.
What are the place values of the number 7600000000?
Individual digits within a number have place values, not whole numbers.
What are the place values of whole number?
A single digit in a number can have a place value. A number with several digits cannot.
A number written as the sum of the values of it's digits?
If it's a one-digit number then any 1-digit number will do (0...9) 2-digits numbers : ab=10a+b=a+b it's not possible unless a=0 For 3-digits: abc=100a+10b+c=a+b+c => 100a+10b = a+b it' not possible unless a=b=0 And so on...
