1, addition

Remember a large number in your mind, count the decimal up, for example, 4+2= remember 4 in your mind, count two numbers up, 5, 6, and then get the result 4+2=6. First of all, tell children that addition means more. For example, when eating, you can ask your child how many you want to eat first, then let him take them one by one, and then tell your child that his things are increasing one by one. This is addition.

Step 2 subtract

The same is true for writing down large numbers, but the decimal number should be counted down, such as 7-4, 7, and then 4, 6, 5, 4, 3, and then the result is 7-4=3. Tell your child to subtract less, that is, if you eat one, you will subtract one, and the last one will be nothing. Then tell the child that addition and subtraction are relative, one is addition and the other is subtraction.

Tips:

Children should keep in mind that the methods of "9-to-0/","8-to-2", "7-to-3", "6-to-4" and "5-to-5" are simple and easy, and the thinking process includes "looking at large numbers (looking at large numbers), dividing decimals (looking at decimals), doing ten and adding even numbers".

First, simply teach children, such as 1+ 1 = 2, 1+2 = 3. First, with physical objects, such as 1+ 1, you can get 1 apple, 1 apple. To deepen the concept of numbers, we should first let children calculate in kind and then teach them to use their fingers.