六數(shù)下冊(cè)總復(fù)習(xí)方程

1、總復(fù)習(xí)方程教學(xué)目標(biāo)：（一）進(jìn)一步理解和掌握求方程的解的方法，并正確地求簡(jiǎn)易方程的解和列方程解文字?jǐn)⑹鲱}。（二）會(huì)用方程表示簡(jiǎn)單情境中的等量關(guān)系，正確解方程，提高解題能力。（三）理解等式的性質(zhì)，會(huì)用等式的性質(zhì)解簡(jiǎn)單的方程。教學(xué)重難點(diǎn)： 使學(xué)生進(jìn)一步理解和掌握求簡(jiǎn)易方程的解的算理和算法，并正確地求簡(jiǎn)易方程的解和列方程解文字?jǐn)⑹鲱}。教學(xué)過(guò)程：一、回顧交流1、回顧方程的含義。并舉例（生憑借已有的經(jīng)驗(yàn)說(shuō)，說(shuō)的不規(guī)范的話先不糾正，在下題中感悟后加深理解）出示：下列各式中是等式的打上“”，是方程的打上“”。 36（） 2+58（） 2.7=3.7（ ） 151十x（ ）第題同時(shí)出現(xiàn)了“”和“”記號(hào)，說(shuō)明了什

2、么？什么是方程？生交流：總結(jié)概括 2、解下列方程。9x-1.8=5.4 54348670 3.5xx=1.73、怎樣解簡(jiǎn)易方程？根據(jù)什么？怎樣檢驗(yàn)？生獨(dú)立思考，小組交流（檢驗(yàn)不做要求，讓學(xué)生了解一下） 小結(jié)：根據(jù)等式的基本性質(zhì)解方程；多步的問(wèn)題要進(jìn)行轉(zhuǎn)化處理，根據(jù)加、減、乘、除各部分的關(guān)系求解。（雖然教材中強(qiáng)調(diào)根據(jù)等式的性質(zhì)解，我覺(jué)得兩種方法都有必要讓學(xué)生了解，選擇自己喜歡的用）4、列方程解決下面的問(wèn)題出示課本p61的2題請(qǐng)同學(xué)們獨(dú)立在練習(xí)本上完成，然后想一想列方程解應(yīng)用題的一般步驟有哪些？說(shuō)說(shuō)你是怎樣做的？生集體交流：強(qiáng)調(diào)：列方程時(shí)，找出等量關(guān)系是很重要的 二、鞏固練習(xí) 1.解方程 2x一5

3、.56=3 3x十1.5x=13.5 （x十2）0.5=1.l 40%x=4.2 6x6=4x4 7x一4.25.8=1.9 2.列方程，并解方程。 （1）某數(shù)增加 5倍后與 3的差等于 117，求某數(shù)。 （2） 15加上一個(gè)數(shù)的 2倍等于 38的一半，求這個(gè)數(shù)。 （3）5的3倍比一個(gè)數(shù)的一半多8，求這個(gè)數(shù)。 （4）某數(shù)的8倍加上10，等于它的10倍減去8，求這個(gè)數(shù)。（5）4.9減去4.9與0.5的積，比x的5倍少1.65，求x。3、甲乙兩個(gè)工程隊(duì)同修一條公路，它們從兩端同時(shí)施工（1）甲隊(duì)每天修a米，乙隊(duì)每天修b米，8天修完，這條公路長(zhǎng)多少米？ （2）如果這條公路長(zhǎng)3000米，甲隊(duì)每天修85米

4、，乙隊(duì)每天修65米，修完這條公路需要幾天？課后延伸： 一個(gè)正方形的邊長(zhǎng)增加它的1/3后，得到的新正方形的周長(zhǎng)是48厘米，原正方形的邊長(zhǎng)是多少厘米？（圖見(jiàn)課本62頁(yè)）geauwydiawgmer4i30ka1dkaghn3xtkknbycudxqa7fhyi2chhi92tgkqcwa3ptgz7r4i30ka1dkagtgkqcwa3p tgz7r4i30ka1dkaghn3xtkknbycudxqa7fhyi2chhi92tgkqcwa3ptgshls50clmtwn60eo8wgqv7xav2ohum32wgeauwydiawgmer4i30ka1dkaghn3xtkknbycudxqa7

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