How did my mother trick me into the old routine of "985"

How did my mother trick me into "985"?

first

Since the third grade, she will reward me with a dime for any wrong question in the exam.

second

If I want to get it, I have to write the wrong question in the wrong book.

And find out.

third

Every other week, my mother will find a question in the wrong book to form a set of test questions. If I do a wrong question, I will be deducted 20 points, so I do it carefully.

fourth

Every month, my mother will adapt the questions in the wrong book for the exam. If I answer a wrong question, I will be deducted three hairs, because I don't have the ability to draw inferences.

stagnant

So since the third grade, I have developed a habit that every knowledge point must be fully understood.