151.1: Round off the pure repeating (recurring) decimal number to the nearest hundred thousandth (5 decimal places)

151.1 rounded to the nearest hundred thousandth (5 decimal 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.

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.

A repeating decimal has a number of decimals that repeat over and over again, infinitely: 151.1 ≈ 151.111111111111111...


Our number is sitting on the axis of numbers between two 5 decimal place consecutive neighboring numbers:
151.11111 < 151.1 < 151.11112


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: (151.11111 + 151.11112) ÷ 2 = 151.111115


Our number, 151.1 ≈ 151.111111111111111..., is smaller than 151.111115, so it is closer to the smaller neighbor: 151.11111


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: 151.111111111111111...

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 1: 151.111111111111111... ≈ 151.11111 rounded to the nearest hundred thousandth (5 decimal places).


Or, even simpler.
In any number rounded to decimal 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 drop all the digits to the right of it:

151.111111111111111... ≈ 151.11111 rounded to the nearest hundred thousandth (5 decimal 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. 151.1 is not halfway between its neighbors.


151.1 ≈ 151.11111


- 151.1 ≈ - 151.11111


rounded to the nearest hundred thousandth (5 decimal places)


Number Round Half Down:

Numbers that are halfway between two neighbors are rounded off to the smaller neighbor. 151.1 is not halfway between its neighbors.


151.1 ≈ 151.11111


- 151.1 ≈ - 151.11111


rounded to the nearest hundred thousandth (5 decimal 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. 151.1 is not halfway between its neighbors.


151.1 ≈ 151.11111


- 151.1 ≈ - 151.11111


rounded to the nearest hundred thousandth (5 decimal places)


Number Round Half Towards Zero:

Numbers that are halfway between two neighbors are rounded off to the neighbor which is closer towards zero. 151.1 is not halfway between its neighbors.


151.1 ≈ 151.11111


- 151.1 ≈ - 151.11111


rounded to the nearest hundred thousandth (5 decimal 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. 151.1 is not halfway between its neighbors.


151.1 ≈ 151.11111


- 151.1 ≈ - 151.11111


rounded to the nearest hundred thousandth (5 decimal 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. 151.1 is not halfway between its neighbors.


151.1 ≈ 151.11111


- 151.1 ≈ - 151.11111


rounded to the nearest hundred thousandth (5 decimal places)


Number Round Ceiling:

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


151.1 ≈ 151.11112


- 151.1 ≈ - 151.11111


rounded to the nearest hundred thousandth (5 decimal places)


Number Round Floor:

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


151.1 ≈ 151.11111


- 151.1 ≈ - 151.11112


rounded to the nearest hundred thousandth (5 decimal places)


More operations like this:

151.2: Round off the pure repeating (recurring) decimal number to the nearest hundred thousandth (5 decimal 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 13 operations with rounded off numbers:

Round off 151.1 to the nearest hundred thousandth (5 decimal places) Apr 18 10:17 UTC (GMT)
Round off 175,090 to the nearest ten thousand (5 whole places) Apr 18 10:17 UTC (GMT)
Round off 2.06666667786769 to the nearest ten (2 whole places) Apr 18 10:17 UTC (GMT)
Round off 2.06666667786769 to the nearest ten (2 whole places) Apr 18 10:17 UTC (GMT)
Round off 457,001 to the nearest ten thousand (5 whole places) Apr 18 10:17 UTC (GMT)
Round off 286.99999999999999 to the nearest tenth (1 decimal place) Apr 18 10:17 UTC (GMT)
Round off 0.12859 to the nearest one (1 whole place) Apr 18 10:17 UTC (GMT)
Round off 0.12859 to the nearest one (1 whole place) Apr 18 10:17 UTC (GMT)
Round off 723.6 to the nearest ten (2 whole places) Apr 18 10:17 UTC (GMT)
Round off 723.6 to the nearest ten (2 whole places) Apr 18 10:17 UTC (GMT)
Round off 1,002,212 to the nearest ten million (8 whole places) Apr 18 10:16 UTC (GMT)
Round off 1,000,725 to the nearest ten million (8 whole places) Apr 18 10:16 UTC (GMT)
Round off 4,449 to the nearest ten thousand (5 whole places) Apr 18 10:16 UTC (GMT)
All the operations with the numbers rounded off by users...

How to round off numbers?

1. Rounding off numbers: definition.

2. How to round off a number to whole places?

3. How to round off a number to decimal places?

4. Mathematical explanation of the rules used in numbers rounding.

5. Special cases. Examples.