If you want children to really understand the meaning of addition and subtraction, then you should let them operate in kind, practice constantly and understand from practice. It is said that mathematics is the gymnastics of thinking. Only by understanding the significance of addition and subtraction can children's thinking be really exercised.
Addition is actually adding two sets together to become one set. Subtraction: Divide a set into two parts.
Children really understand the meaning of addition and subtraction, not knowing the problem, but understanding the relationship between addition and subtraction. For example, six apples can be divided into two and four apples and vice versa. Meanwhile, two and four apples (or four apples and two apples) add up to six apples.
In other words: teach children to start from the decomposition and combination, while expressing in words, and be sure to say it with their mouths. The child who can say it shows that she has really mastered it. Start with less than 5. Let's talk about decomposition 2 first. Remember to put them together after each separation.
Basic method:
Everyone knows that you should learn to count before you learn to calculate, but using various counting forms to lay the foundation for calculation has been ignored by quite a few parents. Many parents think that their children can learn to count by singing and reading 1~ 100, and they can teach calculation, but in fact, their children have not really established the concept of counting and mastered the skills of counting.
When children master the above skills, they can do oral arithmetic in 20 minutes. Parents should pay attention to remind their children to use their own calculation skills to calculate other problems, such as deducing that 2 plus 2 equals 4 and 2 plus 3 equals 5, 3 plus 7 equals 10 and 3 plus 6 equals 9, 9 plus 9 equals 18 and 9 plus 8 equals 17, and so on.