The first volume of this year's seventh grade textbook is a new edition, but it is basically the same as the old edition: the main changes are: (1) The scientific counting method is advanced to the second chapter. (2) In the fourth chapter, the linear equation of one variable is changed a little, (3) the possibility chapter of the old version is gone; Nothing else has changed. Based on the above considerations, the new version of seventh grade mathematics will definitely change a little compared with the old version, but it is still similar to the old version.

(ps: The new version was released only this year, and it should not be listed. )