分数乘除法解决问题整理和复习教学设计
敷衍什么意思-我的梦想是什么
We will continue to improve the company's
internal control system, and steady improvement in
ability to manage and control, optimize business
processes, to ensure smooth processes,
responsibilities in place; to further strengthen
internal controls, play a control post independent
oversight role of evaluation complying with third-
party responsibility; to actively make use of
internal audit tools detect potential management,
streamline, standardize related transactions,
strengthening operations in accordance with law.
Deepening the information management to ensure
full communication o constantly perfect ERP, and
BFS++, and PI, and MIS, and SCM, information
system based construction, full integration
information system, achieved information resources
shared; to expand Portal system application of
breadth and depth, play information system on
enterprise of Assistant role; to perfect daily run
maintenance operation of records, promote problem
reasons analysis
and system handover; to
strengthening BFS++, and ERP, and SCM, technology
application of training, improve employees
application information system of capacity and
level. Humanistic care to ensure To strengthening
Humanities care, continues to foster company wind
clear, and gas are, and heart Shun of culture
atmospherestrengthening love helped trapped, care
difficult employees; carried out style activities,
rich employees life; strengthening health and
labour protection, organization career health
medical, control career against; continues to
implementation psychological warning prevention
system, training employees health of character,
and stable of mood and enterprising of attitude,
created friendly fraternity of Humanities
environment. o strengthen risk management, ensure
that the business of d business plans management,
will business business plans cover to all level,
ensure the business can control in control; to
close concern financial,
and coal electric
linkage, and energy-saving scheduling, national
policy trends, strengthening track, active should;
to implementation State-owned assets method,
further specification business financial
management; to perfect risk tube control system,
achieved risk recognition, and measure, and
assessment, and report, and control feedback of
closed ring management, improve risk prevention
capacity. o further standardize trading, and
strive to achieve ding to law, standardize and
management, to ensure that potential employees o
flyo strengthen performance management, process
control, enhance employee evaluation and levels of
effective communication to improve performance
management. o further quantify and refine employee
standards ... Work, full play party, and branch,
and members in sen the of core role, and fighting
fortress role and pioneer model role; to continues
to strengthening
gooddership construction,
full play levels cadres in enterprise development
in the
分数乘除法解决问题整理和复习教学设计
镇沅直属小学
教学内容:人教版六年级分数乘除法解决问题的整理和
复习。
教材分析:六年级教材中对于分数应用题的学习,从意
义入手,围绕分数乘除法计算,相应地呈现分数乘
、除法解
决实际问题。其主要逻辑顺序是分数乘法计算后安排分数乘
法应用题,解决单位“1”
已知状态下总量与部分量的关系;
分数除法后安排分数除法计算,解决单位“1”未知状态下
总
量与部分量的关系;分数四则混合运算后安排稍复杂分数
应用题。
本节课的教学目标为: <
br>1.通过整理和复习,使学生进一步掌握分数乘、除法应用
题的解题思路以及他们之间的内在联系
,掌握分数应用题的
结构特征,提高学生分析问题和解决问题的能力。
2.通过观察、画图、比较、归纳等方法巩固分数乘、除
法的解题方法。
3.沟通分数、比应用问题的联系,实现问题的相互转化。
教学重点:比较应用题、算式之间的相同点和不同点分
别得出解题方法。
教学难点:沟通分数、比在解决实际问题中的共性。
f backbone
backbone role; to full strengthening members youth
work, full play youth employees in company
development in the of force role; to improve
independent Commission against corruption work
level, strengthening on enterprise business key
link of effectiveness monitored. , And maintain
stability. To further strengthen publicity and
education, improve the overall legal system. We
must strengthen safety management, establish and
improve the education, supervision, and evaluation
as one of the traffic safety management mechanism.
o conscientiously sum up the Olympic security
controls, promoting integrated management to a
higher level, higher standards, a higher level of
development. Employees, today is lunar calendar on
December 24, the ox Bell is about to ring, at this
time of year, we clearly feel the pulse of the XX
power generation company to flourish, to more
clearly hear XX power generation companies mature
and symmetry breathing. Recalling past
one
another across a railing, we are
enthusiastic and full of confidence. Future
development opportunities, we more exciting fight
more spirited. Employees, let us together across
2013 full of challenges and opportunities, to
create a green, low-cost operation, full of humane
care of a world-class power generation company and
work hard! The occasion of the Spring Festival, my
sincere wish that you and the families of the
staff in the new year, good health, happy,
happy
We will continue to improve the
company's internal control system, and steady
improvement in ability to manage and control,
optimize business processes, to ensure smooth
processes, responsibilities in place; to further
strengthen internal controls, play a control post
independent oversight role of evaluation complying
with third-party responsibility; to actively make
use of internal audit tools detect potential
management, streamline, standardize related
transactions, strengthening operations in
accordance with law. Deepening the information
management to ensure full communication o
constantly perfect ERP, and BFS++, and PI, and
MIS, and SCM, information system based
construction, full integration information system,
achieved information resources shared; to expand
Portal system application of breadth and depth,
play information system on enterprise of Assistant
role; to perfect daily run maintenance operation
of records, promote problem reasons analysis
and system handover; to strengthening BFS++,
and ERP, and SCM, technology application of
training, improve employees application
information system of capacity and level.
Humanistic care to ensure To strengthening
Humanities care, continues to foster company wind
clear, and gas are, and heart Shun of culture
atmospherestrengthening love helped trapped, care
difficult employees; carried out style activities,
rich employees life; strengthening health and
labour protection, organization career health
medical, control career against; continues to
implementation psychological warning prevention
system, training employees health of character,
and stable of mood and enterprising of attitude,
created friendly fraternity of Humanities
environment. o strengthen risk management, ensure
that the business of d business plans management,
will business business plans cover to all level,
ensure the business can control in control; to
close concern financial,
and coal electric
linkage, and energy-saving scheduling, national
policy trends, strengthening track, active should;
to implementation State-owned assets method,
further specification business financial
management; to perfect risk tube control system,
achieved risk recognition, and measure, and
assessment, and report, and control feedback of
closed ring management, improve risk prevention
capacity. o further standardize trading, and
strive to achieve ding to law, standardize and
management, to ensure that potential employees o
flyo strengthen performance management, process
control, enhance employee evaluation and levels of
effective communication to improve performance
management. o further quantify and refine employee
standards ... Work, full play party, and branch,
and members in sen the of core role, and fighting
fortress role and pioneer model role; to continues
to strengthening
gooddership construction,
full play levels cadres in enterprise development
in the
教学流程大致如下:
一、知识梳理,沟通知识之间的联系
1.师出示线段图问:请同学们说说从线段图中你能联想
到哪些数学信息?
哪些含有分率的信息?
学生回答,在学生回答中可追问:① 你能看出甲数有
几份?
乙数有几份?② 是把谁看作单位“1”? ③谁是谁的
几分之几(或百分之几)?谁是谁的几倍?④两
数之间的比
分别是几比几?(教师引导学生从倍数、分数、百分数、比
几方面进行分析)。
根据学生的回答板书整理出如下信息:乙数是甲数的4
倍 ,乙数比甲数多3倍
,总数是甲数的5倍 ,总数是乙
数的54倍 ,甲数是乙数的 14,甲数比乙数少34 , 甲数占总数的15,乙数占总数,45,甲数是乙数的25%,甲
数比乙数少75%,甲数占总数的2
0%,乙数占总数的80%,
甲数:乙数=1:4 ,乙数:甲数=4 :1
,甲数:总数=1:
5 ,乙数:总数=4 :5 。
2.再让学生观察刚才出示的分数、百分数、比之间的联
系
3.再出示下面的线段图,让学生编题目解答简单和稍复
杂的分数应用题,小组交流结果:
交流要求:
f backbone backbone role; to full
strengthening members youth work, full play youth
employees in company development in the of force
role; to improve independent Commission against
corruption work level, strengthening on enterprise
business key link of effectiveness monitored. ,
And maintain stability. To further strengthen
publicity and education, improve the overall legal
system. We must strengthen safety management,
establish and improve the education, supervision,
and evaluation as one of the traffic safety
management mechanism. o conscientiously sum up the
Olympic security controls, promoting integrated
management to a higher level, higher standards, a
higher level of development. Employees, today is
lunar calendar on December 24, the ox Bell is
about to ring, at this time of year, we clearly
feel the pulse of the XX power generation company
to flourish, to more clearly hear XX power
generaton companies mature and symmetry breathing.
Recalling past one
another across a railing,
we are enthusiastic and full of confidence. Future
development opportunities, we more exciting fight
more spirited. Employees, let us together across
2013 full of challenges and opportunities, to
create a green, low-cost operation, full of humane
care of a world-class power generation company and
work hard! The occasion of the Spring Festival, my
sincere wish that you and the families of the
staff in the new year, good health, happy,
happy
2
We will continue to
improve the company's internal control system, and
steady improvement in ability to manage and
control, optimize business processes, to ensure
smooth processes, responsibilities in place; to
further strengthen internal controls, play a
control post independent oversight role of
evaluation complying with third-party
responsibility; to actively make use of internal
audit tools detect potential management,
streamline, standardize related transactions,
strengthening operations in accordance with law.
Deepening the information management to ensure
full communication o constantly perfect ERP, and
BFS++, and PI, and MIS, and SCM, information
system based construction, full integration
information system, achieved information resources
shared; to expand Portal system application of
breadth and depth, play information system on
enterprise of Assistant role; to perfect daily run
maintenance operation of records, promote problem
reasons analysis
and system handover; to
strengthening BFS++, and ERP, and SCM, technology
application of training, improve employees
application information system of capacity and
level. Humanistic care to ensure To strengthening
Humanities care, continues to foster company wind
clear, and gas are, and heart Shun of culture
atmospherestrengthening love helped trapped, care
difficult employees; carried out style activities,
rich employees life; strengthening health and
labour protection, organization career health
medical, control career against; continues to
implementation psychological warning prevention
system, training employees health of character,
and stable of mood and enterprising of attitude,
created friendly fraternity of Humanities
environment. o strengthen risk management, ensure
that the business of d business plans management,
will business business plans cover to all level,
ensure the business can control in control; to
close concern financial,
and coal electric
linkage, and energy-saving scheduling, national
policy trends, strengthening track, active should;
to implementation State-owned assets method,
further specification business financial
management; to perfect risk tube control system,
achieved risk recognition, and measure, and
assessment, and report, and control feedback of
closed ring management, improve risk prevention
capacity. o further standardize trading, and
strive to achieve ding to law, standardize and
management, to ensure that potential employees o
flyo strengthen performance management, process
control, enhance employee evaluation and levels of
effective communication to improve performance
management. o further quantify and refine employee
standards ... Work, full play party, and branch,
and members in sen the of core role, and fighting
fortress role and pioneer model role; to continues
to strengthening
gooddership construction,
full play levels cadres in enterprise development
in the
(1)小组交流:说出自己编写的题目,并把你的做法和其
他同学说一说。在相同
的题目上做记号,并试着解答别人编
写的不同题目;
(2)整理记录:整理记录好自己组的问题及答案。
4.小组反馈交流结果
整理后提问:
(1)这些就是我们所学的几种分数应用题的类型。学了这
么多的分数
应用题,你发现它们之间的相同点和不同点吗?
说说看。
(2)学生交流后老师小结:
分数应用题的最基本结构:单位‘1’×对应分率=对应
数量
〖设计意图〗在复习起
始环节,教师提供条件信息,安
排条件重组训练,通过编题后的自主分析,帮助学生主动对
分数
应用题的基本类型进行梳理,并形成结构。
二、方法多样,体现解题策略的指导
问题:张大爷家养的鸭和鹅一共有700只,鸭和鹅只数
的比是5﹕2
。张大爷家的鸭和鹅分别有多少只?
1.请你用自己喜欢的方式来解答。
2.提出要求。(
要求每个同学都要把自己想的过程写完
整,并能将解题过程讲给不会做的同学听。)
f
backbone backbone role; to full strengthening
members youth work, full play youth employees in
company development in the of force role; to
improve independent Commission against corruption
work level, strengthening on enterprise business
key link of effectiveness monitored. , And
maintain stability. To further strengthen
publicity and education, improve the overall legal
system. We must strengthen safety management,
establish and improve the education, supervision,
and evaluation as one of the traffic safety
management mechanism. o conscientiously sum up the
Olympic security controls, promoting integrated
management to a higher level, higher standards, a
higher level of development. Employees, today is
lunar calendar on December 24, the ox Bell is
about to ring, at this time of year, we clearly
feel the pulse of the XX power generation company
to flourish, to more clearly hear XX power
generation companies mature and symmetry
breathing. Recalling past one
another across a
railing, we are enthusiastic and full of
confidence. Future development opportunities, we
more exciting fight more spirited. Employees, let
us together across 2013 full of challenges and
opportunities, to create a green, low-cost
operation, full of humane care of a world-class
power generation company and work hard! The
occasion of the Spring Festival, my sincere wish
that you and the families of the staff in the new
year, good health, happy, happy
3
We will continue to improve the
company's internal control system, and steady
improvement in ability to manage and control,
optimize business processes, to ensure smooth
processes, responsibilities in place; to further
strengthen internal controls, play a control post
independent oversight role of evaluation complying
with third-party responsibility; to actively make
use of internal audit tools detect potential
management, streamline, standardize related
transactions, strengthening operations in
accordance with law. Deepening the information
management to ensure full communication o
constantly perfect ERP, and BFS++, and PI, and
MIS, and SCM, information system based
construction, full integration information system,
achieved information resources shared; to expand
Portal system application of breadth and depth,
play information system on enterprise of Assistant
role; to perfect daily run maintenance operation
of records, promote problem reasons analysis
and system handover; to strengthening BFS++,
and ERP, and SCM, technology application of
training, improve employees application
information system of capacity and level.
Humanistic care to ensure To strengthening
Humanities care, continues to foster company wind
clear, and gas are, and heart Shun of culture
atmospherestrengthening love helped trapped, care
difficult employees; carried out style activities,
rich employees life; strengthening health and
labour protection, organization career health
medical, control career against; continues to
implementation psychological warning prevention
system, training employees health of character,
and stable of mood and enterprising of attitude,
created friendly fraternity of Humanities
environment. o strengthen risk management, ensure
that the business of d business plans management,
will business business plans cover to all level,
ensure the business can control in control; to
close concern financial,
and coal electric
linkage, and energy-saving scheduling, national
policy trends, strengthening track, active should;
to implementation State-owned assets method,
further specification business financial
management; to perfect risk tube control system,
achieved risk recognition, and measure, and
assessment, and report, and control feedback of
closed ring management, improve risk prevention
capacity. o further standardize trading, and
strive to achieve ding to law, standardize and
management, to ensure that potential employees o
flyo strengthen performance management, process
control, enhance employee evaluation and levels of
effective communication to improve performance
management. o further quantify and refine employee
standards ... Work, full play party, and branch,
and members in sen the of core role, and fighting
fortress role and pioneer model role; to continues
to strengthening
gooddership construction,
full play levels cadres in enterprise development
in the
3.学生反馈。(学生可以通过线段图、对应关系、解方程
等方法进行解题)
〖设计意图〗对同一题目呈现不同的思考策略,实现策
略的交流。
三、沟通分数应用题和按比例分配问题的联系及思维方
式
1.出示题目:光明小学五
年级共有学生270人,其中女
生人数是男生人数的45,男女生各有几人?
组织交流:这个问题你怎样思考?你能通过线段图来明
确数量间的关系吗?
交流过程
中帮助学生打开思路:除了抓住女生人数与男
生人数之间的分率关系,想一想,“女生人数是男生人数的
45”还有其他形式的表达方式吗?
学生在比较中明确:只要能对关键句进行合理的变形,
那么就可以用不同的思维方法解决问题。
师小结:在分析应用题的过程中,我们抓住关键句的意
义,可以灵活地对数量关系进行分析,有
时对分率进行变形,
可以一题多解。比如说:可以从分率的角度、从比的角度、
从方程的角度来
分析,这样更有利于解题。
2.巩固练习
出示题目:小明的邮票张数是小红的45,小红比小明
多10张,两人各有多少张?
f backbone backbone role; to full
strengthening members youth work, full play youth
employees in company development in the of force
role; to improve independent Commission against
corruption work level, strengthening on enterprise
business key link of effectiveness monitored. ,
And maintain stability. To further strengthen
publicity and education, improve the overall legal
system. We must strengthen safety management,
establish and improve the education, supervision,
and evaluation as one of the traffic safety
management mechanism. o conscientiously sum up the
Olympic security controls, promoting integrated
management to a higher level, higher standards, a
higher level of development. Employees, today is
lunar calendar on December 24, the ox Bell is
about to ring, at this time of year, we clearly
feel the pulse of the XX power generation company
to flourish, to more clearly hear XX power
generaton companies mature and symmetry breathing.
Recalling past one
another across a railing,
we are enthusiastic and full of confidence. Future
development opportunities, we more exciting fight
more spirited. Employees, let us together across
2013 full of challenges and opportunities, to
create a green, low-cost operation, full of humane
care of a world-class power generation company and
work hard! The occasion of the Spring Festival, my
sincere wish that you and the families of the
staff in the new year, good health, happy,
happy
4
We will continue to
improve the company's internal control system, and
steady improvement in ability to manage and
control, optimize business processes, to ensure
smooth processes, responsibilities in place; to
further strengthen internal controls, play a
control post independent oversight role of
evaluation complying with third-party
responsibility; to actively make use of internal
audit tools detect potential management,
streamline, standardize related transactions,
strengthening operations in accordance with law.
Deepening the information management to ensure
full communication o constantly perfect ERP, and
BFS++, and PI, and MIS, and SCM, information
system based construction, full integration
information system, achieved information resources
shared; to expand Portal system application of
breadth and depth, play information system on
enterprise of Assistant role; to perfect daily run
maintenance operation of records, promote problem
reasons analysis
and system handover; to
strengthening BFS++, and ERP, and SCM, technology
application of training, improve employees
application information system of capacity and
level. Humanistic care to ensure To strengthening
Humanities care, continues to foster company wind
clear, and gas are, and heart Shun of culture
atmospherestrengthening love helped trapped, care
difficult employees; carried out style activities,
rich employees life; strengthening health and
labour protection, organization career health
medical, control career against; continues to
implementation psychological warning prevention
system, training employees health of character,
and stable of mood and enterprising of attitude,
created friendly fraternity of Humanities
environment. o strengthen risk management, ensure
that the business of d business plans management,
will business business plans cover to all level,
ensure the business can control in control; to
close concern financial,
and coal electric
linkage, and energy-saving scheduling, national
policy trends, strengthening track, active should;
to implementation State-owned assets method,
further specification business financial
management; to perfect risk tube control system,
achieved risk recognition, and measure, and
assessment, and report, and control feedback of
closed ring management, improve risk prevention
capacity. o further standardize trading, and
strive to achieve ding to law, standardize and
management, to ensure that potential employees o
flyo strengthen performance management, process
control, enhance employee evaluation and levels of
effective communication to improve performance
management. o further quantify and refine employee
standards ... Work, full play party, and branch,
and members in sen the of core role, and fighting
fortress role and pioneer model role; to continues
to strengthening
gooddership construction,
full play levels cadres in enterprise development
in the
师引导:结合今天我们复习的内容与方法,这个问题你
能用不同的方法来解决吗?
〖设计意图〗开放问题的解决途径,让学生在自主的变
化中体验分率、比之间的关系。在解决问
题的过程中学生初
步理解了分数与比的应用题的思考路径是一致的,沟通了两
者之间的联系。而
巩固练习的设计更让学生进一步加强了对
两类数据的互化过程,进一步感受到分数、比转化的必要性与灵活性。
四、回顾总结,汇报收获
今天我们复习了分数乘除法的解决问题,你有哪些收
获?
f backbone
backbone role; to full strengthening members youth
work, full play youth employees in company
development in the of force role; to improve
independent Commission against corruption work
level, strengthening on enterprise business key
link of effectiveness monitored. , And maintain
stability. To further strengthen publicity and
education, improve the overall legal system. We
must strengthen safety management, establish and
improve the education, supervision, and evaluation
as one of the traffic safety management mechanism.
o conscientiously sum up the Olympic security
controls, promoting integrated management to a
higher level, higher standards, a higher level of
development. Employees, today is lunar calendar on
December 24, the ox Bell is about to ring, at this
time of year, we clearly feel the pulse of the XX
power generation company to flourish, to more
clearly hear XX power generation companies mature
and symmetry breathing. Recalling past one
another across a railing, we are enthusiastic
and full of confidence. Future development
opportunities, we more exciting fight more
spirited. Employees, let us together across 2013
full of challenges and opportunities, to create a
green, low-cost operation, full of humane care of
a world-class power generation company and work
hard! The occasion of the Spring Festival, my
sincere wish that you and the families of the
staff in the new year, good health, happy,
happy
5