Learn General Secretary on \o to learn a\ngthening \ousnesses\nt speech caused a strong reaction in the country. ime, watching \origin of building the party back to power, how to strengthen services for the masses, improve party cohesion, fighting to become the grass-roots party members and masses hot topic. Grass-roots party organizations \ngthen the service of party members and cadres, the pioneer spirit. Distribution of grass-roots party organizations in all walks of people, clothing, shelter, which belongs to the nerve endings of the party organization and comments reputation has a direct perception of the masses. Strengthen the party ahead of the \l\ngthen the party members and cadres \ss does not have to be me\spirit to set the party's positive image among the people is important. Grass-roots party organizations \people not happy not to see \s\honest faithful, diligent faith for the people. No need to avoid mentioning that, some members of our party can not stand the \on of temptation, thin, Xu Zhou, such abuse and corrupt bribery, malfeasance borers, and rats. Two, is to clean up, thin, Xu, Zhou's solution to restore the party's fresh and natural, solid and honest work style. Cleansing \card,\sirable and behaviour, \d and cold, push\-roots party organizations \strengthen the sense of ordinary party members, participating in consciousness, unity consciousness. For reasons known, members of grass-roots party branches less mobile, less resources, and the construction of party organizations have some lag. Two studies, is to focus on the grass-roots party branches \oose, soft, loose\problem, advance the party members and cadres, \orking\Strong cleanup actions, styland rambling, presumptuous \d\s special attention to party members and cadres \ning party of thought\ng\ned in the long-term development of our party's historical experience accumulated. Two is our party under the new historical conditions, strengthen the party's construction of a new \oots party organizations should always catch the hard work, results-oriented. Two educational outcomes are long-term oriented and become an important impetus for the work. \d have three kinds of consciousness \sic learning lies in the doing. Only the Constitution address the series of party rules, and do solid work, be qualified party members had a solid ideological basis. Only the \ng\y, to form a \earn-do-do\ctive of education. This requires that the Organization （1）口算： 50×2=100 50×20=1000 25×4=100 25×8=200 25×12=300 25×40=1000 125×8=1000 125×16=200 125×24=3000 125×80=10000 通过刚才的口算，你们很快就算出结果，你们知道在乘法运算中有三对好朋友，它们分别是谁？ 板书：5×2 25×4 125×8 （2）在□里填上合适的数。 30×6×7=30×（□×□） 125×8×40=（□×□）×□ （3）计算： 43×25×4 25×43×4 比较两道题，在运用乘法运算定律时有什么不同？ 在讨论的基础上，启发学生总结出：第1题只应用乘法结合律把后两个数相乘，就可以使计算简便；第2题要先用乘法交换律把4放在前面，使25与4相乘，或把25放在43的后面，使25与4相乘，然后再用乘法结合律，使计算简便。 小结：用乘法结合律进行简便计算有两种情况：一种是单独运用乘法结合律使计算简便，一种是两个运算定律结合使用，使计算简便。关键要掌握运算定律的内容，根据题目的特点，灵活运用运算定律。 引导学生在对比中加以区分。 （4）师生比赛，看谁直接说出结果速度快。 25×42×4 68×125×8 4×39×25 （5）对比练习： 4×25+16×25 4×25×16×25 (25+15) ×4 （25×15）×4 46×25 （40+6）×25 learning education, need three kinds of consciousness: one is to establish an integrated awareness. \ning\car isTwo-wheel, bird wings, need to go hand in hand, one end can be neglected. Communist theoretician and man. Only by closely combining theory and practice together in order to truly realize their value. \arning\on, the Foundation is not strong, shaking; \net thousands of accounts. \s, going to \so that the \ng\ck to standard, so that the majority of party members \ng theory of nutrients, in the \ce party's purposes. Second, to establish a sense of depth. \ning\organic unity of the whole. \ning education, we need to explore integrating \ning\\nce\d the \ng\ple room instruction, \o a monotone for doing. Should exploration \has \has \ducation and practice of carrier, makes general grass-roots members can in \evements sense, in \s \eory brain into heart, put for people service concept outside of Yu shaped. Third, to adhere to long-term the awareness. Style construction on the road forever, \catch the long-term. \on, by no means, assault-style wind-sport, but the recurrent education within the party. In recent years, the party's mass line education practice and \-three\cial education in grass-roots borne rich fruits, vast numbers of party members and cadres withstood the baptism of the spirit. \onger hold long-term, to establish and perfect the effective mechanism of the education, focusing on the creation of long-term education, strive to make the vast number of party members to maintain their vanguard Color, maintain the party's advanced nature and purity. Awareness-raising, antennas and atmosphere a discussion on how leading cadres of party members \nt, %up and down the country, party cadres as a \h a barometer and impetus. The \ng enough deep, is to determine the party cadres can resolve to study hard first. In the \o\ocess, some cadres of himself, standing long, high awareness, that Constitution Party rules is simple, its not worth bothering some party cadres think speak series has nothing to do with the grass-roots work, water business learning series of speeches seen as window dressing. These \nd decadent\s learning lacks motivation, a serious impediment to \ill once said, only a basic element of human thought patterns change dramatically, human destiny can make great improvement. The same, only party members and 19
Learn General Secretary on \o to learn a\ngthening \ousnesses\nt speech caused a strong reaction in the country. ime, watching \origin of building the party back to power, how to strengthen services for the masses, improve party cohesion, fighting to become the grass-roots party members and masses hot topic. Grass-roots party organizations \ngthen the service of party members and cadres, the pioneer spirit. Distribution of grass-roots party organizations in all walks of people, clothing, shelter, which belongs to the nerve endings of the party organization and comments reputation has a direct perception of the masses. Strengthen the party ahead of the \l\ngthen the party members and cadres \ss does not have to be me\spirit to set the party's positive image among the people is important. Grass-roots party organizations \people not happy not to see \s\honest faithful, diligent faith for the people. No need to avoid mentioning that, some members of our party can not stand the \on of temptation, thin, Xu Zhou, such abuse and corrupt bribery, malfeasance borers, and rats. Two, is to clean up, thin, Xu, Zhou's solution to restore the party's fresh and natural, solid and honest work style. Cleansing \card,\sirable and behaviour, \d and cold, push\-roots party organizations \strengthen the sense of ordinary party members, participating in consciousness, unity consciousness. For reasons known, members of grass-roots party branches less mobile, less resources, and the construction of party organizations have some lag. Two studies, is to focus on the grass-roots party branches \oose, soft, loose\problem, advance the party members and cadres, \orking\Strong cleanup actions, styland rambling, presumptuous \d\s special attention to party members and cadres \ning party of thought\ng\ned in the long-term development of our party's historical experience accumulated. Two is our party under the new historical conditions, strengthen the party's construction of a new \oots party organizations should always catch the hard work, results-oriented. Two educational outcomes are long-term oriented and become an important impetus for the work. \d have three kinds of consciousness \d education, basic learning lies in the doing. Only the Constitution address the series of party rules, and do solid work, be qualified party members had a solid ideological basis. Only the \ng\y, to form a \earn-do-do\ctive of education. This requires that the Organization49×49+49×51 49×99+49 （68+32）×5 68+32×5 学生小组分工后独立完成，再进行小组内交流。 汇报。 二、小结 学生谈收获。 第六课时 教学目标： 1、引导学生探究和理解乘法分配律。 2、培养学生根据具体情况，选择算法的意识与能力，发展思维的灵活性。 3、使学生感受数学与现实生活的联系，能用所学知识解决简单的实际问题。 教学重点：乘法分配律的意义和应用。 教学难点：乘法分配律的反应用。 教学过程： 一、铺垫埋伏 思考问题。 在学习乘法的运算定律时，我们观察了一幅主题图，有的同学还提出了一个问题：一共有多少名同学参加了这次植树活动？ 二、新授 小组讨论，尝试用不同的方法解决。 教师引导学生用多种方法解答。 学生汇报自己的解法。引导学生说明不同算法的理由。 （1）（4+2）×25 =6×25 =150（人） 4+2是每组一共有多少人，在乘25就算出25个小组一共有多少人了。 （2）4×25+2×25 =100+50 =150（人） learning education, need three kinds of consciousness: one is to establish an integrated awareness. \ning\car isTwo-wheel, bird wings, need to go hand in hand, one end can be neglected. Communist theoretician and man. Only by closely combining theory and practice together in order to truly realize their value. \arning\on, the Foundation is not strong, shaking; \net thousands of accounts. \s, going to \so that the \ng\ck to standard, so that the majority of party members \ng theory of nutrients, in the \ce party's purposes. Second, to establish a sense of depth. \ning\ferent, but the organic unity of the whole. \ning education, we need to explore integrating \ning\\nce\d the \ng\ple room instruction, \o a monotone for doing. Should exploration \has \has \ducation and practice of carrier, makes general grass-roots members can in \evements sense, in \s \n into heart, put for people service concept outside of Yu shaped. Third, to adhere to long-term the awareness. Style construction on the road forever, \catch the long-term. \on, by no means, assault-style wind-sport, but the recurrent education within the party. In recent years, the party's mass line education practice and \-three\cial education in grass-roots borne rich fruits, vast numbers of party members and cadres withstood the baptism of the spirit. \onger hold long-term, to establish and perfect the effective mechanism of the education, focusing on the creation of long-term education, strive to make the vast number of party members to maintain their vanguard Color, maintain the party's advanced nature and purity. Awareness-raising, antennas and atmosphere a discussion on how leading cadres of party members \nt, %up and down the country, party cadres as a \h a barometer and impetus. The \ng enough deep, is to determine the party cadres can resolve to study hard first. In the \o\ocess, some cadres of himself, standing long, high awareness, that Constitution Party rules is simple, its not worth bothering some party cadres think speak series has nothing to do with the grass-roots work, water business learning series of speeches seen as window dressing. These \nd decadent\s learning lacks motivation, a serious impediment to \hn Stuart Mill once said, only a basic element of human thought patterns change dramatically, human destiny can make great improvement. The same, only party members and 20
Learn General Secretary on \o to learn a\ngthening \ousnesses\nt speech caused a strong reaction in the country. ime, watching \origin of building the party back to power, how to strengthen services for the masses, improve party cohesion, fighting to become the grass-roots party members and masses hot topic. Grass-roots party organizations \ngthen the service of party members and cadres, the pioneer spirit. Distribution of grass-roots party organizations in all walks of people, clothing, shelter, which belongs to the nerve endings of the party organization and comments reputation has a direct perception of the masses. Strengthen the party ahead of the \l\ngthen the party members and cadres \ss does not have to be me\spirit to set the party's positive image among the people is important. Grass-roots party organizations \people not happy not to see \s\honest faithful, diligent faith for the people. No need to avoid mentioning that, some members of our party can not stand the \on of temptation, thin, Xu Zhou, such abuse and corrupt bribery, malfeasance borers, and rats. Two, is to clean up, thin, Xu, Zhou's solution to restore the party's fresh and natural, solid and honest work style. Cleansing \card,\sirable and behaviour, \d and cold, push\-roots party organizations \strengthen the sense of ordinary party members, participating in consciousness, unity consciousness. For reasons known, members of grass-roots party branches less mobile, less resources, and the construction of party organizations have some lag. Two studies, is to focus on the grass-roots party branches \oose, soft, loose\problem, advance the party members and cadres, \orking\Strong cleanup actions, styland rambling, presumptuous \d\s special attention to party members and cadres \ning party of thought\ng\ned in the long-term development of our party's historical experience accumulated. Two is our party under the new historical conditions, strengthen the party's construction of a new \oots party organizations should always catch the hard work, results-oriented. Two educational outcomes are long-term oriented and become an important impetus for the work. \d have three kinds of consciousness \sic learning lies in the doing. Only the Constitution address the series of party rules, and do solid work, be qualified party members had a solid ideological basis. Only the \ng\y, to form a \earn-do-do\ctive of education. This requires that the Organization 4×25表示25个小组一共有多少个人负责挖坑、种树，2×25表示25个小组一共有多少人负责抬水、浇树。再把它们加起来就是一共有多少人了。 小组合作： （1）两组算式有什么相同点？ （2）两组算式有什么不同点？ （3）两组算式有什么联系？ 汇报。 教师要根据学生的汇报，灵活地进行引导，总结出要点。 你还能举出像这样的几组算式吗？ 学生举例。 根据学生举例板书。 到底我们举的例子是不是符合这样的规律呢？请学生验证。 请学生用语言表述出发现的规律。 板书：两个数的和与一个数相乘，可以先把它们与这个数分别相乘，再相加。这叫做乘法分配律。 (a+b)×c=a×c+b×c a×(b+c)=a×b+a×c 你有什么好方法帮助我们大家记住乘法分配律？ 简记为： 和与一个数相乘=积相加 三、巩固练习 P36/做一做 P38/5 在练习小结中，帮助学生记忆乘法分配律。 四、小结 学生汇报自己的收获。 第七课时 教学目标： 1、引导学生能运用乘法分配律进行一些简便运算。 2、培养学生根据具体情况，选择算法的意识与能力，发展思维的灵活性。 3、使学生感受数学与现实生活的联系，能用所学知识解决简单的实际问题。 learning education, need three kinds of consciousness: one is to establish an integrated awareness. \ning\car isTwo-wheel, bird wings, need to go hand in hand, one end can be neglected. Communist theoretician and man. Only by closely combining theory and practice together in order to truly realize their value. \arning\on, the Foundation is not strong, shaking; \net thousands of accounts. \s, going to \so that the \ng\ck to standard, so that the majority of party members \ng theory of nutrients, in the \ce party's purposes. Second, to establish a sense of depth. \ning\organic unity of the whole. \ning education, we need to explore integrating \ning\\nce\d the \ng\ple room instruction, \o a monotone for doing. Should exploration \has \has \ducation and practice of carrier, makes general grass-roots members can in \evements sense, in \s \eory brain into heart, put for people service concept outside of Yu shaped. Third, to adhere to long-term the awareness. Style construction on the road forever, \catch the long-term. \on, by no means, assault-style wind-sport, but the recurrent education within the party. In recent years, the party's mass line education practice and \-three\cial education in grass-roots borne rich fruits, vast numbers of party members and cadres withstood the baptism of the spirit. \onger hold long-term, to establish and perfect the effective mechanism of the education, focusing on the creation of long-term education, strive to make the vast number of party members to maintain their vanguard Color, maintain the party's advanced nature and purity. Awareness-raising, antennas and atmosphere a discussion on how leading cadres of party members \nt, %up and down the country, party cadres as a \h a barometer and impetus. The \ng enough deep, is to determine the party cadres can resolve to study hard first. In the \o\ocess, some cadres of himself, standing long, high awareness, that Constitution Party rules is simple, its not worth bothering some party cadres think speak series has nothing to do with the grass-roots work, water business learning series of speeches seen as window dressing. These \nd decadent\s learning lacks motivation, a serious impediment to \ill once said, only a basic element of human thought patterns change dramatically, human destiny can make great improvement. The same, only party members and 21
Learn General Secretary on \o to learn a\ngthening \ousnesses\nt speech caused a strong reaction in the country. ime, watching \origin of building the party back to power, how to strengthen services for the masses, improve party cohesion, fighting to become the grass-roots party members and masses hot topic. Grass-roots party organizations \ngthen the service of party members and cadres, the pioneer spirit. Distribution of grass-roots party organizations in all walks of people, clothing, shelter, which belongs to the nerve endings of the party organization and comments reputation has a direct perception of the masses. Strengthen the party ahead of the \l\ngthen the party members and cadres \ss does not have to be me\spirit to set the party's positive image among the people is important. Grass-roots party organizations \people not happy not to see \s\honest faithful, diligent faith for the people. No need to avoid mentioning that, some members of our party can not stand the \on of temptation, thin, Xu Zhou, such abuse and corrupt bribery, malfeasance borers, and rats. Two, is to clean up, thin, Xu, Zhou's solution to restore the party's fresh and natural, solid and honest work style. Cleansing \card,\sirable and behaviour, \d and cold, push\-roots party organizations \strengthen the sense of ordinary party members, participating in consciousness, unity consciousness. For reasons known, members of grass-roots party branches less mobile, less resources, and the construction of party organizations have some lag. Two studies, is to focus on the grass-roots party branches \oose, soft, loose\problem, advance the party members and cadres, \orking\Strong cleanup actions, styland rambling, presumptuous \d\s special attention to party members and cadres \ning party of thought\ng\ned in the long-term development of our party's historical experience accumulated. Two is our party under the new historical conditions, strengthen the party's construction of a new \oots party organizations should always catch the hard work, results-oriented. Two educational outcomes are long-term oriented and become an important impetus for the work. \d have three kinds of consciousness \d education, basic learning lies in the doing. Only the Constitution address the series of party rules, and do solid work, be qualified party members had a solid ideological basis. Only the \ng\y, to form a \earn-do-do\ctive of education. This requires that the Organization教学过程： 一、复习准备 出示： 1.口算： 73+27 138×100 100-64 64×1 8×9×125 （4+40）×25 2.在□里填上适当的数。 302=300+□ （300+2）×43=300×□+2×□ 2003=2000+□ （2000+3）×14=2000×□+□×□ 二、新授 我们已经学习了乘法分配律，今天继续研究怎样应用乘法分配律使计算简便。 出示102×（ ） 学生任意填上一个两位数。 老师迅速说出它的得数，而不用笔算。 出示： 计算102×43 小组讨论完成。 学生可能出现： （1）（100+2）×43 （2）102×（40+3） 在对比的基础上，教师引导学生观察题目的特点，以及怎样应用乘法分配律，从而使学生明确：两个数相乘，把其中一个比较接近整十、整百、整千的数与一个数的和，再应用乘法分配律可以使计算简便。 小练： （1）在□里填上适当的数。 3001×84=□×84+□×84 92×203=92×（200+□） =92×200+92×□ learning education, need three kinds of consciousness: one is to establish an integrated awareness. \ning\car isTwo-wheel, bird wings, need to go hand in hand, one end can be neglected. Communist theoretician and man. Only by closely combining theory and practice together in order to truly realize their value. \arning\on, the Foundation is not strong, shaking; \net thousands of accounts. \s, going to \so that the \ng\ck to standard, so that the majority of party members \ng theory of nutrients, in the \ce party's purposes. Second, to establish a sense of depth. \ning\ferent, but the organic unity of the whole. \ning education, we need to explore integrating \ning\\nce\d the \ng\ple room instruction, \o a monotone for doing. Should exploration \has \has \ducation and practice of carrier, makes general grass-roots members can in \evements sense, in \s \n into heart, put for people service concept outside of Yu shaped. Third, to adhere to long-term the awareness. Style construction on the road forever, \catch the long-term. \on, by no means, assault-style wind-sport, but the recurrent education within the party. In recent years, the party's mass line education practice and \-three\cial education in grass-roots borne rich fruits, vast numbers of party members and cadres withstood the baptism of the spirit. \onger hold long-term, to establish and perfect the effective mechanism of the education, focusing on the creation of long-term education, strive to make the vast number of party members to maintain their vanguard Color, maintain the party's advanced nature and purity. Awareness-raising, antennas and atmosphere a discussion on how leading cadres of party members \nt, %up and down the country, party cadres as a \h a barometer and impetus. The \ng enough deep, is to determine the party cadres can resolve to study hard first. In the \o\ocess, some cadres of himself, standing long, high awareness, that Constitution Party rules is simple, its not worth bothering some party cadres think speak series has nothing to do with the grass-roots work, water business learning series of speeches seen as window dressing. These \nd decadent\s learning lacks motivation, a serious impediment to \hn Stuart Mill once said, only a basic element of human thought patterns change dramatically, human destiny can make great improvement. The same, only party members and 22
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