Hello, subject, because there are many versions of the math books in the second volume of Senior Two, such as People's Education Edition, Soviet Education Edition, Beijing Normal University Edition, Hunan Education Edition, Hubei Education Edition, West Normal University Edition, Chinese Edition, and Ministry Edition. Different versions of textbooks will lead to different rankings of partial application problems. It is suggested that the topic owner find the paper book or e-book of the textbook version he needs (which can be found in Baidu Search Electronic Textbook Network) and browse the textbook. But personally, I think it is very important to master the division application problem, because division is the most basic algorithm and cannot be separated from the calculation of expulsion method in mathematics, so the subject needs to master the division application problem seriously, no matter how ranked. I hope it can help the subject.