Introduction to the complete solution of the third elementary school olympiad 1000 problem.
Since its publication, the series "1000 complete solution for junior (middle) schools" has attracted a large number of primary and secondary school students' active and enthusiastic input. The majority of math enthusiasts and math majors have a training platform for math competitions, which can broaden their knowledge, master methods, train their thinking and improve their abilities. The concept of "drawing inferences from one instance to another" is well received by readers.