《中小学数学》(小学版)2012年第4期《怎样求不规则海绵的体积》一文。笔者对胡老师精湛的教学技艺和善于钻研的精神表示钦佩。文中为我们清楚生动地讲述了与学生的研究过程,并且得出了比较满意的方法。看过“编者语”之后,我对“海绵的体积究竟如何定义也有困难”这句话表示赞同。我想,像海绵、棉花 “Primary and secondary mathematics” (primary school edition) 2012 fourth issue “how to find the volume of irregular sponge” article. The author expresses admiration for Mr. Hu’s superb teaching skills and his dedication to studying. The article clearly and vividly tells us the process of studying with students, and come to a satisfactory method. After reading “The Editors’ Language,” I agree with the statement, “How can the volume of sponges be defined?” I think, like sponge, cotton