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理解两位数乘两位数的乘法的算理在具体解决总住户的计算问题时教材呈现了三种算法前两种是计算两位数乘整十数两位数乘一位数再将这两部分的积相加这是乘法竖式计算的重要基础本节课应注重口算方法与竖式方法的沟通第三种是竖
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