一、教材分析《两位数乘两位数的整理和复习》是人教版三年级下册第四单元的内容。两位数乘两位数是小学生学习数学所必备的基础知识和基本技能,是进一步学习的重要基础。教材中安排了两方面的内容:一是对两位数乘两位数的单元进行回顾和整理,使学生在头脑中形成较为完整、系统的知识模块,以提升学生对本单元知识的掌握水平;二是集中安排了一组练习,在学生回顾整理的基础上对两位数乘两位数的算理、算法及其应用进行复习巩 First, the textbook analysis “double-digit double-digit finishing and review” is the third edition of the PEP fourth unit content. Double-digit double-digit is the basic knowledge and basic skills necessary for primary school students to learn mathematics, is an important basis for further learning. Textbook arranged two aspects: First, the two-digit by two-digit unit to review and organize, so that students in mind to form a more complete and systematic knowledge module to enhance students’ mastery of the unit knowledge; The second is to arrange a group of exercises focused on the basis of the students review finishing two digits by two digits arithmetic, algorithm and its application review