### Retain two decimals how to retain?

Valid numbers are counted from the first number on the left that is not 0. For example, 1.0023, retaining two valid numbers is 1.0, and the first number that is not 0 is taken two places from the beginning, this is the practice for decimals with integers that are not 0. It is different when the integer is 0.

For example: 0.0123, retain two decimal, then 0.01, the third decimal rounded. When two valid digits are retained, which can only be done by multiplying powers, it should be represented as 1.2 x 10^(-2), with -2 in parentheses being the -2nd power.

Rounding rules for valid numbers:

1. When n valid numbers are retained, if the n+1st digit is ≤ 4 it is rounded off.

2. When retaining n valid digits, if the n+1th digit ≥ 6, then the nth digit into 1.

3. When retaining n valid digits, if the n+1st digit = 5 and the number of digits behind the 0, then the nth digit if the number is an even number of digits will be rounded off the number of digits behind the nth digit if the nth digit of the number is an odd number of digits, plus 1; if the nth digit = 5 and behind the number of digits behind the number of digits that are not 0, regardless of the nth digit of any number of digits. If the n+1th digit = 5 and there is any number that is not 0 after it, 1 is added regardless of whether the nth digit is odd or even.

### What is the method of retaining two decimal places?

Retaining two decimal places means that when a number is taken as an approximation, the first two digits after the decimal point are retained and the third digit is rounded up. For example, 1.0023 is 1.00 if two decimal places are retained.

The least significant digit is the percentile, and a zero is added directly after the digit that is not enough, for example, 2.3 = 2.30.

Retaining two decimal places is a method of converting an approximate number, and the converted value is similar to the exact number value.

The homotypic algorithm

Rounding four to five is a counting retention method for accuracy. Here, “four” is less than five means, “six” is more than five means, “five” is the rounding bit after the tail number of five words look at the previous one, odd into even not into. Such as 1.25 to keep a decimal, because 2 is even, so is 1.2. and 1.35, because 3 is odd, so is 1.4.

From a statistical point of view, “rounding up to five double” than “rounding up to five” to be scientific, which makes the result of rounding up some of the results of the larger, some of the smaller, more average. Instead of rounding up to five, which leads to results in favor of large numbers.

### How to keep two decimals …

The general method of retaining two decimals is rounding. To retain two decimals, look at the thousandths place. Round off if it’s 4 or less than 4; round off if it’s 5 or more than 5 and then go one place forward.

Example 1: 3.425 retaining two decimals is 3.43

3.421 retaining two decimals is 3.42

Example 2:

3.4263 retaining two decimals is 3.43

3.4233 retaining two decimal places is 3.42

Example three: 3.4 retain two decimal places is 3.40

Expanded information:

The method of retaining several significant digits in decimals and the difference between retaining two decimal places after the decimal point and retaining two significant digits:

First of all, it is necessary to understand the concept of significant digits, which refers to the number that is not 0 in the first place on the left. Start counting, for example, 0.0023, which has two significant digits.

In addition, I would like to explain the difference between retaining two decimals and retaining two significant digits, the same example.

1.0023, with two decimal places, would be 1.00, with two places after the decimal point.

With two significant figures, it is 1.0, with two digits after the first number that is not zero.

This is the practice for decimals where the integer is not 0, but is different when the integer is 0.

For example: 0.0123, retaining two decimals, is 0.01, with the third decimal rounded up.

The retention of two significant figures can only be achieved by multiplying by a power, which should be expressed as 1.2×10^(-2). The -2 in parentheses is the -2 power.

### What is 0.0848 with two decimal places?

0.0848 retained to two decimal places is 0.08, retained to two decimal places will look at the third place, the third place is 4 or less will be rounded off, is 5 or more will be rounded up