It is very important to learn the nature of decimals, which is the basis for calculating the four decimal places. For example, when adding, subtracting, multiplying and dividing decimals, if there is a "0" or several "0" at the end of the decimal part of the calculation result, you can remove 0 according to the nature of decimals to simplify decimals. Generally speaking, the results of decimal calculation should be simplified to make the results concise and easy to remember. However, it should be noted that when simplifying decimals, only the "0" at the end can be removed, and the "0" in the middle cannot be removed, otherwise the size of decimals will change.

Sometimes, you can add "0" after the decimal point as needed. For example, when calculating the abdication subtraction of decimals, such as 24- 18.75, you can add two zeros after the decimal point in the lower right corner of unit 24, that is, write the integer as a decimal, and then calculate:

24.00- 18.755.25

For another example, when calculating the fractional division, you can also add one or more "0" at the end of the decimal as needed, and then calculate.