How about a big math trick?

It's good to promote math.

Because the big move to popularize mathematics is to do problems with simple ideas and deal with some problems more simply, it is very good to popularize mathematics.

Mathematics is a subject that studies concepts such as quantity, structure, change, space and information.

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Seek the fourth grade Olympic math test questions and answers in primary school.

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Mathematical multiplication, especially how to recite, is simple, thank you.