I'm not even familiar with the multiplication formula in grade three. I am really worried about my IQ when I say it. It's disgusting. I feel really retarded and laughed at.

Recite it every day and use it every day. Practice makes perfect! I want to know, since I'm not familiar with you, how did you get to the third grade? Don't you fail every math exam? ? Nothing is difficult in the world, if you put your mind to it! I don't know if you remember carefully Pupils generally have a good memory and can't forget it! If you really work hard, you may really be born with a lack of mathematics. Don't blame yourself, everyone has shortcomings, you can't hide them. You can develop in other ways. Come on (_? )? ! ?