1. Concept introduction: It can explain what two or three digits and two digits are and their relationship. It can be described by simple language and image examples, so that readers can understand the basic concept of dividing two or three digits by two digits.
2. Basic rules: explain the basic rules of dividing two digits or three digits by two digits, such as how to determine the number of digits of quotient and how to deal with the situation that cannot be divided. It can be illustrated by practical examples, so that readers can understand it better.
3. Example analysis: select some representative examples of dividing two or three digits by two digits for detailed analysis. Include calculation steps, result interpretation, etc. , let readers know how to actually operate.
4. Important notes: list the notes that should be paid attention to when dividing two or three digits by two digits, such as avoiding carelessness and checking the calculation results.
5. History of Mathematics: You can introduce some development or interesting mathematical stories about the division of two or three digits by two digits in the history of mathematics, so that readers can understand the mathematical background.
The function of division:
1, division and equal division: division can divide a whole into equal parts, for example, a cake is divided into 8 parts, each of which is equal in size. This split operation is very common in life.
2. Calculate percentage: Division can be used to calculate the percentage of one number to another, such as the percentage of sales of a certain product to total sales.
3. Coordinate system: Division plays an important role in coordinate system. For example, in a plane rectangular coordinate system, the coordinates of a point can be represented by two numbers, the first number representing the abscissa and the second number representing the ordinate. Here, division is used to calculate the value of the ordinate.
4. Speed measurement: Division can be used to calculate speed, such as how many kilometers a vehicle travels per hour. In this case, division is used to calculate the distance change within the time interval.
5. Calculation of the amount of matter: In chemistry, division can be used to calculate the amount of matter. For example, in a solution, the amount of solute substance can be calculated by the concentration and volume of the solution. Here, division is used to calculate the total amount of matter.