2. Calculation of mathematical addition, subtraction, multiplication and division. For example, the sale of goods, the calculation of dates, and the calculation of time.

3. Area calculation. Own housing area, park area, playground activity area and so on.

4. When riding a bicycle, the number of meters you walk with your pedal. We can measure the radius of the wheel, and then use the circumference formula of the circle to find out.

5, family life cost calculation, after learning mathematics, will be involuntarily used in life. The overall planning method is often used, such as the arrangement of a series of things in the process of cooking, which are all learned in mathematical science.