In fact, 8-9 months is the key period for the baby to identify the size, but this is a vague analysis. When the baby reaches 1 year, it has the basic definition of counting. For example, knowing one, in fact, at this moment, the actual objects are integrated, 1 finger, 2 apples, 3 bananas and so on.
Babies under 4 years old can master numbers below 10. When they are 5-6 years old, it is a critical period to master the mathematical definition, and the rate of rest addition and subtraction will soon increase. If you don't teach according to the baby's development law, the baby will have no way to understand, and you will naturally have no interest in learning.
If you want your baby to be interested in mathematics, you can use this method first to let your baby know the value of numbers in daily life. Parents can visualize and refine the numbers below 10. For example, everyone has a nose, hands and 10 fingers. There are five people in the family, grandpa, grandma, dad, mom and baby. Parents can also let the baby set wooden chopsticks and bowls before meals, learn the concept of counting, and let the baby learn to serve others. Secondly, it is also valuable for babies to learn the number arrangement and size below 10.
Therefore, there is a way for the baby to learn addition and subtraction. If the way is wrong, the baby still doesn't know what he is doing and has absolutely no interest in learning. Therefore, babies of different ages need different methods to really learn. Only by letting the baby have his own interests can he learn actively and feel more at ease in teaching.
In fact, I let my baby deliver meals to learn addition and subtraction below 5, and I also learned to enjoy it. Addition, subtraction, multiplication and division also need to be completed by entity combination or counting fingers, so it is not suitable for babies to use abacus to calculate addition and subtraction.