(1) carry addition within 50: align with the same digit, starting from the single digit. When the digit reaches ten, the tenth digit should be added with one. Don't forget to add one when you add up the tenth digit.

(2) Subtraction of abdication within 50: align with the same digit and subtract from the single digit. If the single digits are not enough, borrow a ten from the ten digits and subtract it. Don't forget to borrow one when you subtract the number from the decimal number.

There is no need to teach addition and subtraction within 50. At first, I learned addition and subtraction within 10. After I am familiar with this, I can learn addition and subtraction within 20 minutes. The addition and subtraction of advance and retreat within 20 shall be converted into 10 by adding ten and borrowing ten. There will be no problem if you study for less than 50 years, and you have the previous foundation.

1. Start with an integer.

2. Teach children to be patient first, and don't rush for success. Children's understanding ability is still insufficient, and parents can teach their children addition and arithmetic with something. For example, using sticks and biscuits, etc. Arouse children's interest and they will be more confident in learning.

Don't deliberately teach arithmetic, you can experience it in life.

The addition and subtraction within 50 belongs to the knowledge content of mathematics in the first grade of primary school. The addition and subtraction within 50 requires students to master the calculation method skillfully, and the calculation problems can be calculated accurately and quickly. So, how to teach by counting your fingers? Before counting fingers, students must skillfully practice counting from 1 to 50. Generally, we teach by counting, for example, how much is one number plus another?

We count up from the first number and count as many as we add, so that students can work out this number easily.