199, it rounds to 200 because it's closer to 200 than 100. It is also closer to 200 than to 190. And finally, 1 + 9 + 9 = 19
To find the 3-digit number, we consider the rounding information and sum of digits . The number is 190. Since the sum of the digits is 19, we can deduce that the tens digit is 9 and the units digit is 0. Therefore, the 3-digit number is 190. ;
The 3-digit number that rounds to 200 both when rounding to the nearest hundred and nearest ten, and whose digits sum to 19, is 199.
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