一、 小數(shù)乘法··································2
二 、小數(shù)除法··································18
　　取近似值的方法··································27
　　循環(huán)小數(shù)··································28
三、 平行四邊形、梯形和三角形·················38
　　平行四邊形··································39
　　梯形·············································47
　　三角形·············································54
　　組合圖形············································· 64
　　認識千米2和公頃 ····························67
四、 統(tǒng)計圖表與可能性·····························73
　　平均數(shù)·················································· 77
　　統(tǒng)計圖···················································82
　　可能性 ···················································86
五、 方程···················································88
　　用字母表示數(shù)·································89
　　方程···················································93
六、 數(shù)學百花園 ··································99
　　密鋪···················································99
　　雞兔同籠問題··································101
七、總復習·················································102

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