1. Both the frontal lobe and the parietal lobe of the brain play an important role in mathematical activities.

2. Mathematical activities are not only in the left hemisphere, but also in the right hemisphere.

3. Computers can include at least two kinds: one is actuarial and the other is estimation. In the past, we paid too much attention to actuarial science. Now, estimation is also an important mathematical function that can not be ignored, and it has a greater relationship with the frontal lobe of the brain.

4. Children's cognition of quantity has a development process, which can be divided into three stages: number discrimination, number recognition and number counting.

One distinction is to distinguish the number of two groups of elements. /kloc-Many children over 0/year old have been able to correctly distinguish multiple items from less items, and about 2 years old is a critical period for the development of digital discrimination ability.

B. Recognition means that you can intuitively know the number of elements in a set without counting points. The critical period for the development of numeracy ability is about 3 years old.

C. counting refers to counting things one by one and telling how many things there are in total. It should be noted that calculating by things and saying the total are two different processes, first calculating by things and then saying the total. About three and a half years old is a critical period for the development of points.

5. Research shows that children master the concept of ordinal number (the order between numbers) only after they know the cardinal number (the size of numbers), that is, they know a few first and then master the first one.

Although children in the past have been able to distinguish and recognize numbers, there is almost no concept of "which number".

About 5 years old is an important period for children to master counting skills.

6.？ Visualization of abacus mental arithmetic is the process of completing quick abacus calculation in your mind.