Describe a useful skill you learned in a math class from your primary/high school I suppose the most useful skill I've ever learned in a math class must be solving problems by equations. I learned it in grade four in primary school.I still remebered that my math teacher then was a strict but responsible woman. One day, she put a question about a traditional Chinese math problem called"Chickens and rabbits math problem"and introduced equations to us. At that time, I thought equations were one of the most amazing things in the world. Those math problems which seemed quite hard before can be solved within minute by using equations. Without any exaggerations, the equations concept changed my perspectives on math problems and even the world.Equations transform complex and abstract math problems into concise and normalized models. What's more, it is easy to understand and learn for everyone.To me, equations have become an necessary part of my life. That's not only because my major is computer science and I need to solve many math problems. In fact, in the real life, everytime I need to know some unknown values, I will turn to equations for help.