讀了中等專業学校代数(1956年8月上海第一版)“近似計算”一章以后,我觉得它比卡尔宁著的譯本——試用本同章在編写方面要好得多;叙述簡潔,基本概念交代得明显突出,習題也比較充实,因此使用这一教本在教学方面所能取得的效果一定会更大,但是在这一章中,我以为还有些問題值得商榷,將我的認識写在下面,請同志們指正。 1.§18近似数的取法,举了“四舍五入法”,也举了“去尾法”,我認为同时应簡介“收尾法”,因为教本本身在講絕对誤差界及过剩近 After reading the chapter “Approximate Calculations” in the secondary professional school algebra (first edition in Shanghai, August 1956), I think it is much better than Carnegie’s translation—the trial is written in the same way as the chapter; the narrative is concise. The basic concept has been given a prominent account and the exercises have been more substantial. Therefore, the effect of using this textbook in teaching will be even greater. However, in this chapter, I think there are still some questions that are worth discussing and writing about my understanding. In the following, please correct me. 1. The method of 18 approximations is referred to as “rounding off method” and also “eliminate method”. I think that “tailing method” should be introduced at the same time because the textbook itself is talking about absolute error and excess.