When the sum of the digits you are adding is 10 or larger.
The sum of the digits is also a multiple of 9. And, if the sum of the digits is too large, you can sum those digits and keep going.
Add the digits together. The sum of the digits of 23 is 5.
1 + 1 = 2 The sum of the digits is therefore 2.
The sum of the digits in 252 is 2 + 5 + 2 which equals 9.
The sum is 22 times the sum of the three digits.
The sum of all the digits of all the positive integers that are less than 100 is 4,950.
-99
1000000
199
199 If it's 200 rounded to nearest ten, then the number must be between 195 and 205. Only 199 has the correct digit sum.
To round to the nearest hundred and ten both being 200 it leaves 9 possibilities. 195,196,197,198,199,201,202,203, and 204. The only one with digits adding up to 19 is 199.
The sum of all the integers between 1,000 and 2,000 is 1,498,500.
When the sum of the digits you are adding is 10 or larger.
It is 45.
3+5 = 8
the sum of my digits is 6? answer=60