受《中学数学杂志》(初中 ) 2 0 0 2年第 4期第 2 9页的《误批的点悟》(下文称《点悟》)的启发 ,对初中几何课本中的近似计算题仔细研究了一番 ,发现其中确实存在问题 .不过我认为 ,《点悟》也有误 ,其误在于对近似数的认识不够清楚 ;而初中几何课本中的错误 ,是对近似数乘法法 Inspired by Misappropriate Enlightenment (hereinafter referred to as “God Witness”) of the “Middle School Mathematics” (secondary school), 2002, No. 4, pp. 29, careful calculation of approximate calculations in geometry textbooks for junior high school students. After studying a lot, I found that there is a problem. However, I think that “Mengwu” is also wrong. The mistake is that the understanding of the approximate number is not clear enough. The mistake in the junior high school geometry textbook is the approximate multiplication method.