125: Round off the integer number to the nearest hundred (3 whole places)

125 rounded to the nearest hundred (3 whole places) = ?

How is the number rounded off? Half Up, Half Down, Half Away From Zero, Half Towards Zero, Half to Even, Half to Odd. To Ceiling, To Floor.

What does it mean to round off a number?

Rounding a number means replacing it with a simpler, shorter approximation, while keeping its value close to the initial one. The rounded number will be less accurate, but easier to work with.


How is the number rounded off? Explanation.

Counting by hundreds (3 whole places at a time), our number is sitting on the axis of numbers between two consecutive neighboring numbers:
100 < 125 < 200


Our number is to be rounded off to one of these neighbors, the closer one.


The middle of this interval, the number that is equally close to the either neighbor, is: (100 + 200) ÷ 2 = 150


Our number, 125, is smaller than 150, so it is closer to the smaller neighbor: 100


Except for 'To Ceiling, To Floor', the rounded off number (both the positive and the negative) will be equal only to this smaller neighbor.


Rule of thumb:

Rounding digit. Let's call the digit of the position place that is intended to round off to as the 'rounding digit'. The digit is 1: 125

In a positive number, if the digit to the right of the 'rounding digit' is smaller than 5, then the number is rounded to the smaller neighbor.

The digit is 2: 125 ≈ 100 rounded to the nearest hundred (3 whole places).


Or, even simpler.
In any number rounded to whole places, if the digit to the right of the 'rounding digit' is less than 5 (0 to 4), then leave the 'rounding digit' as it is and replace all the digits to the right of it with zeros:

125 ≈ 100 rounded to the nearest hundred (3 whole places)


Below we round off both the positive and the negative:

Half Up, Half Down, Half Away From Zero, Half Towards Zero, Half to Even, Half to Odd. To Ceiling, To Floor.


Number Round Half Up:

Numbers that are halfway between two neighbors are rounded off to the larger neighbor. 125 is not halfway between its neighbors.


125 ≈ 100


- 125 ≈ - 100


rounded to the nearest hundred (3 whole places)


Number Round Half Down:

Numbers that are halfway between two neighbors are rounded off to the smaller neighbor. 125 is not halfway between its neighbors.


125 ≈ 100


- 125 ≈ - 100


rounded to the nearest hundred (3 whole places)


Number Round Half Away From Zero:

Numbers that are halfway between two neighbors are rounded off to the neighbor which is farther away from zero. 125 is not halfway between its neighbors.


125 ≈ 100


- 125 ≈ - 100


rounded to the nearest hundred (3 whole places)


Number Round Half Towards Zero:

Numbers that are halfway between two neighbors are rounded off to the neighbor which is closer towards zero. 125 is not halfway between its neighbors.


125 ≈ 100


- 125 ≈ - 100


rounded to the nearest hundred (3 whole places)


Number Round Half to Even:
(Gaussian Rounding or Banker's Rounding)

Numbers that are halfway between two neighbors are rounded off to the neighbor with an even rounding digit. 125 is not halfway between its neighbors.


125 ≈ 100


- 125 ≈ - 100


rounded to the nearest hundred (3 whole places)


Number Round Half to Odd:
(Gaussian Rounding or Banker's Rounding)

Numbers that are halfway between two neighbors are rounded off to the neighbor with an odd rounding digit. 125 is not halfway between its neighbors.


125 ≈ 100


- 125 ≈ - 100


rounded to the nearest hundred (3 whole places)


Number Round Ceiling:

All the numbers that are between two neighbors are always rounded off to the larger neighbor.


125 ≈ 200


- 125 ≈ - 100


rounded to the nearest hundred (3 whole places)


Number Round Floor:

All the numbers that are between two neighbors are always rounded off to the smaller neighbor.


125 ≈ 100


- 125 ≈ - 200


rounded to the nearest hundred (3 whole places)


More operations like this:

126: Round off the integer number to the nearest hundred (3 whole places)


All Numbers Are Rounded Off: Half Up, Half Down, Half Away From Zero, Half Towards Zero, Half to Even, Half to Odd. To Ceiling, To Floor. Rounding Off Integers, Terminating Decimals, Pure or Mixed Repeating (Recurring) Decimal Numbers

Round off to whole places or decimal places

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