129: Round off the integer number to the nearest ten (2 whole places)

129 rounded to the nearest ten (2 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 tens (2 whole places at a time), our number is sitting on the axis of numbers between two consecutive neighboring numbers:
120 < 129 < 130


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: (120 + 130) ÷ 2 = 125


Our number, 129, is larger than 125, so it is closer to the larger neighbor: 130


Except for 'To Ceiling, To Floor', the rounded off number (both the positive and the negative) will be equal only to this larger 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 2: 129


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

The digit is 9: 129 ≈ 130 rounded to the nearest ten (2 whole places).


Or, even simpler.
In any number rounded to whole places, if the digit to the right of the 'rounding digit' is 5 (but it is not the last non-zero digit to the right) or more than 5, ie. 6, 7, 8 or 9, then increase the 'rounding digit' by 1 and replace all the digits to the right of it with zeros:

129 ≈ 130 rounded to the nearest ten (2 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. 129 is not halfway between its neighbors.


129 ≈ 130


- 129 ≈ - 130


rounded to the nearest ten (2 whole places)


Number Round Half Down:

Numbers that are halfway between two neighbors are rounded off to the smaller neighbor. 129 is not halfway between its neighbors.


129 ≈ 130


- 129 ≈ - 130


rounded to the nearest ten (2 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. 129 is not halfway between its neighbors.


129 ≈ 130


- 129 ≈ - 130


rounded to the nearest ten (2 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. 129 is not halfway between its neighbors.


129 ≈ 130


- 129 ≈ - 130


rounded to the nearest ten (2 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. 129 is not halfway between its neighbors.


129 ≈ 130


- 129 ≈ - 130


rounded to the nearest ten (2 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. 129 is not halfway between its neighbors.


129 ≈ 130


- 129 ≈ - 130


rounded to the nearest ten (2 whole places)


Number Round Ceiling:

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


129 ≈ 130


- 129 ≈ - 120


rounded to the nearest ten (2 whole places)


Number Round Floor:

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


129 ≈ 120


- 129 ≈ - 130


rounded to the nearest ten (2 whole places)


More operations like this:

130: Round off the integer number to the nearest ten (2 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

The latest rounded off numbers

Round off 129 to the nearest ten (2 whole places) May 18 17:26 UTC (GMT)
Round off 3.293 to the nearest hundredth (2 decimal places) May 18 17:22 UTC (GMT)
Round off 8.8637 to the nearest hundredth (2 decimal places) May 18 17:21 UTC (GMT)
Round off 8.5 to the nearest one (1 whole place) May 18 17:14 UTC (GMT)
Round off 195 to the nearest ten (2 whole places) May 18 17:11 UTC (GMT)
Round off 564.7539 to the nearest hundredth (2 decimal places) May 18 17:08 UTC (GMT)
Round off 8.8636 to the nearest hundredth (2 decimal places) May 18 17:07 UTC (GMT)
Round off 29 to the nearest ten (2 whole places) May 18 16:33 UTC (GMT)
Round off 2,005.6 to the nearest hundred (3 whole places) May 18 16:29 UTC (GMT)
Round off 6,998.1 to the nearest hundred (3 whole places) May 18 16:29 UTC (GMT)
Round off 1,298.5 to the nearest hundred (3 whole places) May 18 16:28 UTC (GMT)
Round off 278.1 to the nearest hundred (3 whole places) May 18 16:28 UTC (GMT)
Round off 78,331 to the nearest hundred (3 whole places) May 18 16:27 UTC (GMT)
All the numbers rounded off by users