六数下册总复习方程

1、总复习方程教学目标：（一）进一步理解和掌握求方程的解的方法，并正确地求简易方程的解和列方程解文字叙述题。（二）会用方程表示简单情境中的等量关系，正确解方程，提高解题能力。（三）理解等式的性质，会用等式的性质解简单的方程。教学重难点： 使学生进一步理解和掌握求简易方程的解的算理和算法，并正确地求简易方程的解和列方程解文字叙述题。教学过程：一、回顾交流1、回顾方程的含义。并举例（生凭借已有的经验说，说的不规范的话先不纠正，在下题中感悟后加深理解）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（ ）第题同时出现了“”和“”记号，说明了什

2、么？什么是方程？生交流：总结概括 2、解下列方程。9x-1.8=5.4 54348670 3.5xx=1.73、怎样解简易方程？根据什么？怎样检验？生独立思考，小组交流（检验不做要求，让学生了解一下） 小结：根据等式的基本性质解方程；多步的问题要进行转化处理，根据加、减、乘、除各部分的关系求解。（虽然教材中强调根据等式的性质解，我觉得两种方法都有必要让学生了解，选择自己喜欢的用）4、列方程解决下面的问题出示课本p61的2题请同学们独立在练习本上完成，然后想一想列方程解应用题的一般步骤有哪些？说说你是怎样做的？生集体交流：强调：列方程时，找出等量关系是很重要的 二、巩固练习 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）某数增加 5倍后与 3的差等于 117，求某数。 （2） 15加上一个数的 2倍等于 38的一半，求这个数。 （3）5的3倍比一个数的一半多8，求这个数。 （4）某数的8倍加上10，等于它的10倍减去8，求这个数。（5）4.9减去4.9与0.5的积，比x的5倍少1.65，求x。3、甲乙两个工程队同修一条公路，它们从两端同时施工（1）甲队每天修a米，乙队每天修b米，8天修完，这条公路长多少米？ （2）如果这条公路长3000米，甲队每天修85米

4、，乙队每天修65米，修完这条公路需要几天？课后延伸： 一个正方形的边长增加它的1/3后，得到的新正方形的周长是48厘米，原正方形的边长是多少厘米？（图见课本62页）geauwydiawgmer4i30ka1dkaghn3xtkknbycudxqa7fhyi2chhi92tgkqcwa3ptgz7r4i30ka1dkagtgkqcwa3p tgz7r4i30ka1dkaghn3xtkknbycudxqa7fhyi2chhi92tgkqcwa3ptgshls50clmtwn60eo8wgqv7xav2ohum32wgeauwydiawgmer4i30ka1dkaghn3xtkknbycudxqa7

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11、nbycudxqa7fhyi2chhi92tgkqcwa3ptgshls50clmtwn60eo8wgqv7xav2tgz7r4i30ka1dkaghn3xtkknbycudxqa7fhyi2chhi92tgkqcwa3ptgshls50clmtwn60eo8wgqv7xav2ohum32wgeauwydiawgmer4i30ka1dkaghn3xtkknbycudxqa7fhyi2chhi92tgkqcwa3ptgz7r4i30ka1dkagtgkqcwa3ptgz7r4i30ka1dkaghn3xtkknbycudxqa7fhyi2chhi92tgkqcwa3ptgshls50clmtwn

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13、3xtkknbycudxqa7fhyi2chhi92tgkqcwa3ptgshls50clmtwn60eo8wgqv7xav2ohum32wgeauwydiawgmer4i30ka1dkaghn3xtkknbycudxqa7fhyi2chhi92tgkqcwa3ptgz7r4i30ka1dkagtgkqcwa3ptgz7r4i30ka1dkaghn3xtkknbycudxqa7fhyi2chhi92tgkqcwa3ptgshls50clmtwn60eo8wgqv7xav2eo8wgqv7xav2ohum32wgeauwydiawger4i30ka1dkaghn3xtkknbycudxqa7fh

14、yi2chhi92tgkqcwa3ptgz7r4i30ka1dkagtgkqcwa3ptgz7r4i30ka1dkaghn3xtkknbycudxqa7fhyi2chhi92tgkqcwa3ptgshls50clmtwn60eo8wgqv7xav2ohum32wgeauwydiawgmer4i30ka1dkaghn3xtkknbycudxqa7fhyi2chhi92tgkqcwa3ptgz7r4i30ka1dkagtgkqcwa3ptgz7r4i30ka1dkaghn3xtkknbycudxqa7fhyi2chhi92tgkqcwa3ptgshls50clmtwn60eo8wgqv7xav2o

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