One of my favorite classes is an interesting math class given to us by Mr. Wang.

I learned mixed simple calculation in the fourth grade. The first class that day was math. After Mr. Wang came in, he wrote a few questions on the blackboard, and then we started the competition in groups to see which group finished first. The first few questions, everyone is a green light all the way, because the question is very simple. But when it comes to the middle question, some students are stunned. This problem is written as follows: (25+ 12)×4. Many people use twenty-five plus twelve, so you should multiply thirty-seven by four directly. As a result, the simple calculation turned into a complicated calculation, and everyone scratched their heads like ants on hot bricks.

A few questions came down, and because we mastered the trick of simple calculation, everyone answered correctly without any effort. In this math class, each of our groups is scrambling. The most important thing is that Mr. Wang taught us to master an interesting method, which made us feel the charm of clever calculation in math class. Therefore, I like this course best.