### 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 way to keep two decimals is to take two digits directly after the decimal point and round the third digit. Decimals, a special form of real numbers. All fractions can be expressed as decimals, and the dot in a decimal is called the decimal point, which is the dividing number between the whole number part and the decimal part of a decimal. A decimal in which the integer part is zero is called a pure decimal, and a decimal in which the integer part is not zero is called a carry decimal.

### How to keep two decimal places

To keep two decimal places, we need to see the third decimal place, that is, the number of thousandths, if the number of thousandths is less than 5, it will be rounded off; if the number of thousandths is greater than or equal to 5, it will be rounded up to the hundredths place, and at the same time, the number after the hundredths place will be rounded off.

For example: 5.164 (retain two decimal places), because the thousandths place is 4, less than 5, rounded off, so 5.164 ≈ 5.16; 5.165 (retain two decimal places), because the thousandths place is 5, is equal to 5, to the percentile one, so 5.165 ≈ 5.17 ……