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How to teach children under the age of 20 to do mental arithmetic
The 20 learning methods of children's mental arithmetic are as follows:

First of all, let the children skillfully recite the numbers within 20 and the decomposition of numbers.

We ask children to recite numbers skillfully in order to increase their sensitivity to numbers and increase their understanding of numbers.

For teaching children to know numbers, parents can adopt physics teaching methods, such as: one candy, two candy, three candy, four candy ... one apple, two apples, three apples, four apples, and so on. In this way, children will increase their impression of numbers, associate them with specific representative meanings, and know what each number stands for.

Secondly, learn addition first, then subtraction.

Addition is the foundation. When children have a certain understanding of numbers and can recite them skillfully, they can be taught simple addition.

We can start with the simplest 1+ 1=2, 1+2=3. We should also use our physical teaching method when adding, because it is more intuitive and the children are more impressed. For example, 1 apple+1 apple =2 apples; 1 apple +2 apples =3 apples. Children's minds will have a preliminary understanding of addition, which means that addition is increased and more.

mathematics

British mathematician Bacon said: "Mathematics is the key to science. Ignoring mathematics will certainly hurt all knowledge. " . The real meaning of learning mathematics lies in learning to think, explore, reason and innovate, which are all produced by the development of left brain potential. In other words, if we neglect the use of the left brain and the cultivation of mathematical logic thinking ability, it will be very difficult to learn other subjects.