1. Judging from the difficulty of knowledge points in the textbook, the fourth-grade mathematics difficulty of Beijing Normal University Edition is slightly higher than that of Beijing Edition. This is mainly reflected in the fact that Beijing Normal University Edition pays more attention to the cultivation of mathematical thinking and the mastery of mathematical methods, and requires higher understanding of some important concepts and mathematical ideas. Beijing version of mathematics pays more attention to the mastery of basic knowledge and skills, and the difficulty is relatively stable.

2. Judging from the difficulty of after-school exercises, the difficulty of after-school exercises of fourth-grade mathematics in Beijing Normal University Edition is slightly higher than that in Beijing Edition. This is mainly because the types of after-class exercises in Beijing Normal University are more diverse, which requires students to have higher thinking ability, and some topics are more difficult, which requires students to have strong ability to analyze and solve problems. Beijing version of mathematics is relatively simple, and students can consolidate their knowledge points through practice.