1. Different textbooks: According to different classes, the products of multiplication formulas are different, and each class has only one formation. But the Soviet version uses the 12 cube, which remains unchanged. The product of each multiplication formula is the same, and different pendulum methods correspond to different multipliers.

2. Different contents: Su Jiao Edition refers to a series of textbooks for primary and secondary schools published by Jiangsu Education Publishing House, which is a Phoenix national standard textbook and conforms to the experimental textbook of compulsory education curriculum standards. The textbooks published by Jiangsu Education Press include not only those published by Jiangsu Education Press, but also those published by other publishers, such as Yilin Edition, Su Ke Edition, Su Shao Edition and Su Ren Edition, covering various disciplines, including English, mathematics, physics, music, art and politics.