双基“（基础知识、基本技能）对数学学习极端重要，早已成为匆需争议的命题．”双基“是中国特色的提法，也是中国数学教育的长处之一．但是，对”双基“的理论研究却很少有人深入做过．笔者在华东师大访学期间，经反复研讨，决定将基本技能的测定作为整个研究的第一步．中学数学基 The ”basic knowledge“ and ”basic skills“ are extremely important to mathematics learning and have long been the subject of hurried controversy. ”Double base“ is a reference to Chinese characteristics and is also one of the strengths of Chinese mathematics education. However, The theoretical research of ”double base" is rarely done in depth. During repeated visits by the East China Normal University, the author decided to take the determination of basic skills as the first step of the entire study.