北京版三年级数学下册电子课本教材(义务教育教科书)

一、 年、月、日
　　年、月、日······························7
　　闰年······························7
二、 乘法······························8
三、 吨的认识······························20
四、 解决问题······························26
五、 长方形和正方形的面积······························37
　　1.面积和面积单位
　　2.长方形和正方形的面积
　　3.面积单位间的进率
　　围绿地······························54
六、 分数的初步认识······························55
七、 小数的初步认识······························68
八、 认识方向······························79
九、 整理数据······························82
十、 数学百花园······························85
　　1.比较
　　2.合理安排时间
十一 、总复习······························87
前 言
亲爱的同学∶
很高兴和你一起步入数学学习之旅!
在数学之旅中你会遇到很多数学问题和能够运用数学知识解决的实际问题。开动脑筋，认真思考，你就会成功地解决这些问题，相信你一定会在这个过程中感受到快乐的!
我们一起出发吧！

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