北师大版四年级数学下册电子课本教材(义务教育教科书)

目录
一、小数的意义和加减法 ····································2 ，
二、 认识三角形和四边形····································20
三 、小数乘法························································33
整理与复习、·························································48
四、 观察物体························································53
五、 认识方程························································61
数学好玩、·····························································76
六、 数据的表示和分析········································83
总复习、··································································96

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