
目錄
一、小數(shù)的意義和加減法 ····································2 ,
二、 認識三角形和四邊形····································20
三 、小數(shù)乘法························································33
整理與復習、·························································48
四、 觀察物體························································53
五、 認識方程························································61
數(shù)學好玩、·····························································76
六、 數(shù)據(jù)的表示和分析········································83
總復習、··································································96