Decimal system is a number system, which is used to represent various parts of numbers. It is usually used to represent the part of a number between an integer and a fraction. For example, when we need to represent a number between 1 and 2, we can use a decimal, such as 5. Decimal values include an integer part and a decimal part. The decimal part is usually limited, but it can also be an infinite cycle decimal. Decimals are widely used in mathematics, science, engineering, finance and other fields.

Decimals are widely used in life. For example, we need to use decimals when measuring the length or weight of an object every day. In the commercial and financial fields, decimals are also indispensable tools, such as stock prices, interest rates, tax rates and so on. Decimals also play an important role in computer programming, because the binary of a computer is decimal. In addition, decimals are also an indispensable part in mathematical research, physics, chemistry and other fields.

The significance and value of decimal is that it can decompose a number into integer parts and decimal parts, so that we can describe and calculate numerical values more accurately. The use of decimals makes it easier for us to adjust the size and accuracy of numerical values in calculation, which makes the calculation results more accurate. In daily life, the application of decimals is also helping us to better understand and apply mathematical knowledge, such as helping us to better understand concepts such as fractions and percentages. Therefore, decimals, as an important tool in mathematics, have great significance and value.