Experimental class. There are a lot of problems in this set of papers, and each unit will be equipped with difficult Olympic math problems, which are suitable for children with good grades and flexible thinking. Because the characteristic of this paper is to cultivate excellent students, the quality of its basic topics is actually average, and the children suitable for this paper are excellent, so we still have to finish it selectively.

The exercises in this set of papers usually consist of three parts: foundation, expansion and open inquiry. When practicing, you can skip the basic questions and practice expansion and open inquiry directly.