一、長方體和正方體····································1
包裝中的數(shù)學(xué)問題········································26
二、折線統(tǒng)計(jì)圖與可能性·····························28
家庭生活中的碳排放·····································39
三、因數(shù)和倍數(shù)··············································41
四、分?jǐn)?shù)的意義和基本性質(zhì)··························58 工
五、分?jǐn)?shù)的加法和減法··································81
六、數(shù)學(xué)百花園……········································97
七、總復(fù)習(xí)·······················································99
附頁 ·.·······························································.107
親愛的同學(xué)：
很高興和你一起步入數(shù)學(xué)學(xué)習(xí)之旅！
在數(shù)學(xué)之旅中你會(huì)遇到很多數(shù)學(xué)問題和能夠運(yùn)用數(shù)字際問題。開動(dòng)腦筋，認(rèn)真思考，你就會(huì)成功地解決這些問題，相信你一定會(huì)在這個(gè)過程中感受到快樂的！
我們一起出發(fā)吧！

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