1. visual counting method

Visual counting method is an introductory method for children to learn mental arithmetic, which is mainly calculated through visual recognition. For example, if the topic 3+2= is listed on paper, children can easily connect 3 and 2 with their fingers or numbers to get the answer 5.

2. Formula memory method

Formula memorization method is to let children calculate mathematical problems by memorizing simple formulas, such as: "4 plus 3, answer 7;" 4 minus 3, the answer is 1 ". This method can not only improve the speed of children's oral calculation, but also attract their attention and stimulate their interest in mathematics.

Step 3 add different terms

The same addition of different items refers to the addition of other numbers in the same group except the last number, and the last number can be added to get the result, such as 6+8=6+6+2= 14. This method can help children better understand the essence of addition and subtraction and improve their computing ability.

4. Digital relationship method

The number relation method allows children to calculate through the size relation of numbers. For example, when calculating 3+7, children can know that 3 is smaller than 7 by 4, and then add 4 to 7 to get the answer 1 1. This method can improve children's ability to understand and judge numbers.

5. Password system

Cryptography is based on interest, which transforms numbers into interesting figures or symbols for calculation. For example, draw the number 1 as a bunch of red roses and the number 2 as a yellow duckling, so that children can complete mental arithmetic by recognizing this figure or symbol.

The above are common mental arithmetic methods based on children's cognition and interest. While teaching these methods, teachers and parents need to guide and demonstrate with concrete examples, and pay attention to cultivating children's interest and self-confidence in mathematics. In addition to the above common mental arithmetic methods, children can also improve their mental arithmetic ability through games and exercises.

Here are some specific suggestions:

1. Practice in the form of games

You can practice with some interesting games, such as guessing numbers and counting roulette. This can not only increase children's interest, but also strengthen their computing ability.

2. Practice in daily life

Mathematics can be used in daily life to help children do practical exercises, such as shopping checkout, measuring cups and mastering time. This can help children combine abstract mathematical theory with concrete practice and understand the application and significance of mathematics more deeply.

3. Establish a sense of computing

Children need to realize that mathematics is a process that needs constant practice and exploration, and all problems cannot be solved by backrest formula. Children are advised to think and calculate for themselves as much as possible, and teachers and parents should also give timely encouragement and guidance.

In short, the improvement of children's mental arithmetic ability needs to be guided and cultivated from three aspects: cognition, interest and practice. Only by mastering the basic calculation methods and skills, but also encouraging children to think and practice independently, can children's mathematical literacy and mental arithmetic ability be better improved.