What we know in grade one is almost all addition and subtraction within 20. Addition and subtraction within 20 is actually the basis for children to build numbers. Therefore, everyone should let the baby know what is behind the numbers. In fact, this is the way our baby gradually adopts when learning and training numbers, such as swinging a stick and counting fingers. This way looks rough and low-level, but it is actually the process of children gradually establishing digital entity models.

A simple example, three apples, three banana apples, three oranges and three children, after a lot of observation, children can generate the number three from their brains, which is a very difficult link. If you leave this specific object in life, it is difficult for children to calculate numbers, so parents must strengthen their practice in these areas. Naturally, for the practice of numbers, everyone should let the children generate corresponding entities in their minds to realize the calculation. Some parents may think that it is right for children to abstract everything, which is very difficult for first-grade children. Do not encourage them.

The most important breakthrough in the calculation of senior one is the abacus calculation of carry addition and abdication subtraction within 20, which is actually based on the composition and decomposition of 10. The first grade should solve the problem of hand index in kindergarten. Comprehensive understanding of various scenes is the basis of the ten-point method. I'm teacher Li, focusing on the classic questions and answers of primary school students! Understanding is to better remember these five pairs of friends, 1 and 9, 2 and 8, 3 and 7, 4 and 6, 5 and 5. Parents can usually write a number anytime and anywhere.

Ask the children to answer their best friends, listen and calculate. In fact, I still hope you can tell your mistakes and look at your children's homework, so that what suits you best will be more purposeful. Finally, children are very prone to make mistakes in verbal calculation, and you need to find out the reason. He made a mistake or was arbitrary in the calculation of special numbers. If the number is fixed and there is a mistake, we can jump out and practice the formula of addition, subtraction, multiplication and division independently, and we will not make a mistake if we remember it. If it is arbitrary, it is careless and unskilled. We must practice more from simple to difficult. I think oral arithmetic must be practiced crazily, and you can also ask questions orally to make him react quickly!