To teach children addition and subtraction, let them learn to count, let them learn to judge the size of numbers, help them understand the meaning of addition and subtraction, and follow the principle of easy before difficult.

In the process of children learning addition and subtraction, we should follow the principle of easy before difficult, first add and subtract from 10 to 20, step by step, and lay a solid foundation. This can not only improve children's interest in learning, but also improve their sense of accomplishment in learning and let them learn to add and subtract.

Many times, parents will think that educating children is to instill knowledge in children and let them remember. In fact, this idea is wrong. Educating children should not only teach them the concept of knowledge, but also teach them to use it.

Addition and subtraction are the most accessible mathematical knowledge for children in their daily life. Parents can create a mathematics environment for their children, so that they can understand that mathematics is not boring, but exists in life, which is interesting.

For example, when preparing breakfast for children in the morning, you can give them six biscuits, let them draw all the biscuits in the book, wipe off one after eating, and then explain the concept of "6- 1 = 5" to children, so that they can understand from their own behavior that subtraction is removal.

Similarly, so is addition. Under this constant cultivation, children can establish a basic understanding of addition and subtraction, and lay a good foundation for children to learn more addition and subtraction of numbers.