How do you round a number to the nearest ten thousand?

Answer 1

The answer is 400

Because there is a 0

Answer 2

The rule of rounding numbers is that if a number is 4 or less it becomes 0, and if a number is 5 or more it becomes a 0 and the number immediately to the left of it increases by 1.

If you want to round to the nearest ten thousand, look at the number in the thousands position; if that number is 4 or less the ten thousand digit will remain the same and the thousands digit will drop to 0, but if that digit is 5 or more the ten thousand digit will increase by one and the thousands digit will become 0.

For example, take the number 123,456 (or one hundred and twenty-three thousand, four hundred and fifty-six)

To round that to the nearest ten thousand look at the ten thousand position digit (which is the 2) and take the digit immediately to the right (which is the 3 in the thousands position). Because 3 is always rounded down the 3 becomes a 0, and so we now have 120,000, or one hundred and twenty thousand.

If instead we take the number 126,789 (or one hundred and twenty-six thousand, seven hundred and eighty-nine), the number in the ten thousand position is still the 2 - which is the number we are rounding to - and the digit immediately to the right is a 6 this time.

Because 6 is more than 5 (see above, way back up there ^^^ at the start) the 6 becomes a 0 and the number immediately to the left in the ten thousand position increases by 1 so the rounded number is now 130,000 or one hundred and thirty thousand.