Math is very important.  Let’s look at the following example. When you buy candy, you must talk about how many dollars or cent you need to draw. When you go to work, you must see a watch to find out what time it is, and you can count whether it’s late or not at work. When there is a Child who has a birthday, you must know the number of the birthday, not even that, you can judge whether you are old or young.

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