1, let children learn to count skillfully. First of all, let the children learn to count, from 1 to 20, let the children reach a skilled reading, and let the children skillfully start counting from a certain number in the middle after being familiar with it for a period of time. For example, the teacher said: count from 4; Count from 14. After the children can fully grasp the reading of 1 to 20, they will begin to learn the reciprocal of 1 to 20. Through practice, they can skillfully count down from a certain number in the middle. Example: The teacher said: Count down from 8, and count down from 16.

2. Let children master the relationship between numbers. Children can master the reciprocal of positive numbers within 1 to 20 and begin to let them know the positional relationship between numbers. For example, what is in front of 6? What's behind? What's in front of 9? What's behind? Count forward from 3, count backward, count forward from 1 1, count backward. Knowing the positional relationship between numbers, it is necessary for children to begin to master the relationship between numbers, such as: which is bigger, 5 or 8? 14 or 9, which is bigger?

3. After the children have mastered the number 1 to 20, they can start learning arithmetic. First of all, we should teach our children to read the questions, let them know how to pronounce "+"and "-",and let them know that they count backwards when reading "plus" next. When you read "minus", you count forward. Let the children skillfully say which of the two digits and which of the ten digits. For example: 15, the unit is 5, and the decimal number is 1.

4. The initial arithmetic is mainly addition and subtraction within ten, and the basic method is counting. For example, 5+4 means counting from six to four, counting to six, seven, eight and nine. Of course, at this time, children can also be taught the equation 2+7=7+2, so that children can quickly calculate 2+7. Subtraction is similar, just counting forward. This step is very basic and critical. Only by mastering it firmly can we proceed to the next step. Through long-term training, children will basically master addition and subtraction within ten.

5. Learn the addition and subtraction between 1 1-20. At this time, you can use the method of rounding 10. For example, 8+7 = (8+2)+5 =10+5 =15. There are two basic requirements for this step: first, you should be very familiar with adding a few equals10; The second is to know that 10 plus a few equals more than ten. Subtraction can be done by borrowing ten:17-8 = (10+7)-8 = (10-8)+7 = 2+7 = 9. The same addition is required.