I am used to playing WeChat in this impetuous world, but I have never tried to calm my brain and do some simple divergent mathematical operations. I heard that doing more operations can prevent Alzheimer's disease. Believe it or not, I believe it anyway.

Remember to divide 24 points by addition, subtraction, multiplication and multiplication? It is here, don't play, don't know if you are stupid! The classic counts 24 points, test your intelligence.

Improve quick calculations, develop intelligence, and improve life and entertainment.

Little friends, come and try it!

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