教学北师大版小学数学3年级下册第3单元。教材分析:对于学生来说,经历从两位数乘一位数到两位数乘两位数的乘法过程是形成乘法计算技能的重要环节,也是后续学习两位数乘三位数的基础。为此教材以“住新房”的情境为载体,通过解决一栋楼的总住户的问题,帮助学生探索并理解两位数乘两位数的乘法的算理。在具 Teaching Beijing Normal University version of elementary school mathematics grade 3 volumes under the third unit. Textbook Analysis: For students, experiencing the multiplication process from double-digit to double-digit to double-digit is an important part of forming a multiplicative calculation skill and is also the basis for subsequent double-digit and three-digit learning. This textbook uses the context of “living in a new home” as a vehicle to help students explore and understand the arithmetic of double-digit and double-digit multiplication by solving the problem of the total resident of a building. With