? What is onion mathematics?
Onion Mathematics is an online learning platform. Through 5-8 minutes of animation, explain related mathematical concepts, unlimited viewing times, and cooperate with handouts, exercises and tests to achieve personalized learning goals.
The traditional mathematics learning method of reciting mathematical formulas and doing problems repeatedly will make children feel boring and abstract mathematical concepts difficult to understand. Onion mathematics can arouse children's interest in mathematics learning through the story animation that can attract children the most. A short film can understand a mathematical concept, which is very convenient for you to preview and review before and after class!
? Topics of this chapter:
? 1. I learned that there are three different days in each month: 28, 30, 31* *.
2. You can determine how many days there are in each month.
? The main contents of this chapter:
Figure 1
Figure 2
Through animation, children can clearly know the laws of year, month and day, and how they come from. (Figure 1)
Sun: It rises in the sun and sets in the west, and the time is only one week of the earth.
Month: From the perspective of the moon's profit and loss, it is the time for the moon to go around the earth once.
Year: Observed from the rotation of the four seasons, it is the time for the earth to go around the sun once.
In addition to introducing the mathematical history of the big moon and the small moon, it is also supplemented by animation to quickly distinguish the big moon and the small moon through fists and formulas. (Figure 2)
? Key points that students often ignore:
Figure 3
1. There is a set for judging a flat year and a leap year (Figure 3).
It is skillful to judge a flat year and a leap year. By observing the records of each year, we find that the AD year can be divisible by 4, and if it is divisible, it is a leap year.
Figure 4
2. Understand the origin of leap year (Figure 4)
Students may not understand why there is an extra day every four years. Through animation and explanation, we understand that after careful calculation, every year is actually 365 days and 6 hours, so if you save 6 hours every year, you can make up one day every four years. An extra day will be added to February, so in a leap year, February will have 29 days.
? You can study at home:
Parents can interact with their children through the following questions, the answers of which can be found in the animation.
1. Why do some months have more days and some months have fewer days? How to quickly judge the size of the moon?
2. Why are there two 7 o'clock in a day?
3. Why do some people have their birthdays only once every four years?
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