330 rounded to the nearest hundred is 300. When rounding a number to the nearest hundred, you look at the digit in the tens place. If it is 5 or greater, you round up; if it is less than 5, you round down. In this case, the tens digit is 3, which is less than 5, so the hundreds digit remains the same.
The nearest hundred to 330 is 300.
300
330
330
330
330
300
330.0
326 rounded to the nearest 10 = 330
330
300.
330