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.
When you are late, you need to register with the person on duty and ask to write down the name of the grade class. In this way, the school will know which class is the latest this week and which class is the latest.