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蔡上鹤先生系九年义务教育三年制初级中学数学教科书(人民教育出版社)主编之一.本文选自由他编著的《初中数学学习问答》小丛书,该小丛书分一年级、二年级、三年级三册,即将由我社出版.
Mr. Cai Shanghe is one of the chief editors of the nine-year compulsory education three-year junior high school mathematics textbook (People’s Education Press). This article is selected from a series of junior high school mathematics learning questions and answers written by him. The small series is divided into grades I, II, and III. Three grades will be published by our company.