On that day a long time ago, the teacher gave us an interesting math lesson, which is the most interesting lesson I have ever had.

The bell rang and we hurried back to the classroom. The teacher was already standing on the podium, writing something on the blackboard ... I had to take out my book absently. Mathematics has always been a subject I don't like. Very boring, very boring ... I mechanically took notes on my desk, waiting for class to end.

A, b, c, square, decimal, fraction, percentage ... This lesson is about the number axis. I thought it was a boring class, but I can clearly feel the cheerful mood of the helicopter students, which is not available in any class. I couldn't help laughing and raised my hand. ...

The teacher compared the numbers to a big family. There are many small families in this family.

Positive numbers, negative numbers ... and more small families, integers and fractions ... The teacher talked about their relationship seriously, like telling the history of a family, occasionally inserting a few humorous words to cause a burst of laughter ... 45 minutes passed in joy, the bell rang slowly, and everyone left the classroom wanting more.

That class. I like math, like those small numbers, abstruse formulas, simple equations ... It was that interesting math class that made me fall in love with math.