人教版小学数学三年级上册教案全集

1、毫米的认识学习设计共 6 课时总第 1 课时教学目标：1、使学生经历测量过程，知道毫米产生的实际意义。2、通过观察，明确毫米与厘米的关系，会进行简单的换算。3、使学生在操作中学会用毫米作单位进行测量。4、使学生建立1 毫米的长度观念。教学过程：一、情景导入1、小组合作学习，估计课本的长、宽、厚。（ 1）出示例1 情境图，学生认真观察。教师提出问题。（2）4 人小组合作，分别估计一下数学课本的长、宽、厚。将估计的结果填在记录表的 “估计”一栏中。（ 3）对估计的结果进行反馈。2用测量的方法验证估计的结果。（ 1）分组测量课本的长、宽和厚。测量时，将遇到的问题记录下来，用自己喜欢的方法表示测量的结

2、果。（2）交流测量的结果，引出毫米。板书课题“毫米的认识”。二、探究体验1、了解毫米与厘米的关系。（ 1）提问： “从尺中，你发现毫米与其他单位间的关系吗？”。evelopmentworksteadilyi n the pilotcounties,to buildpeace neighbor hood offices approve d, cha nge,ur ban a ndrural communities （Ce nter）,immigrant communities, pilot pr oject s such a s integratedmanagementofur ban and

3、rural sanitati on in orde r.（D）maintain social harmony a ndsta bility.Inthe case oftight financialsituation, continuetoincreasetheinput ofpeople,happy people battle.Urba n ce ntralheati ng and upgra derural power gri ds,r ural reconstruction ofshabbyhousing tenmajor proje cts beingdelivered, has bee

4、n overfulfilled a head.Strengtheni ng ofsocialpr ograms, collegeentra nce examinati on t orecor d heig hts; new rurali nsura nce coverage rate ofthecitys first,launched in ne wruralcooperativemedicalcli nicco-ordi nation; .PerfectParkcatering,a ccommodati on, e ducation, recreati on a nd othertertia

5、ry industries supporting,improvi ng socializati onservi ce level,forindustries,businessesand createa g ood environmentfordev elopment.3, flexi bleinvestme nt,enhance thei ndustry.Construction ofindustrialparks,justsetup aplatform forthe devel opme ntofonlyattract moreproject s into t hedi strict,tof

6、orm aggl omerationa dvantages.Ainnovationproject. To bepurposef ul,targeted investme nt,will havea ba sis oftheCountys i ndustrial package d bundles, overall publi city and pr omotion.Initiativegoing, plea se come in a nd carryoutall -round, m ulti-leve land wide -range ofinvestmenta ctivities.T he

7、Tow nship i ndustrialpr oject s,in principle ,toput to the Westindustrialparks.Whattownproject, i sthatthe out putvalueoftheow nship.Se cond, wemustgrasp the standards selecte d items. Fullaccountofextend theindustrychai n andthe i ntegration offactorsof pr oducti on, not onlyeffortsto i ntroduce an

8、um berofscientific andtechnol ogicalcontent a nd higha dde dvalue,gr owtha nd strong drivingforce oflargeproject sand large enter prises,but also on domesti c-funde d enter prise sand in a ccorda nce withthe direction of i ndustrialdevel opme nt ofsmall a ndmedi um project s,project ma n,small pr oj

9、e ct overw helming. Meet the area ofthe Countys new industrial pr ojects and cityba ckint o ruralenergysavinga ndemission reduction project s playanim portantrol e.Vigorouslydevel opi ng agriculture,e coolgical agri culture,agriculture ,moder nagriculturalcl earing al ong the RiverPromenade beginsto

10、takesha pe.Keytourism pr oje cts isgoi ngwell,WAPalaceareawasname d top ten mosti nfluential cultural relics i n He bei provi nce landsca pe.Devel op newse rvices,and services withnewdevelopments.(C)urban-ruralintegrati on pr ocess. Promoti ng three-year difference campaign,battleoftwo large dem oli

11、tioncom pleted32 daysof 530,000 square meters, exceeded theannual Task7 monthsin adva nce.Ge neralbig buildingjia ngjun roa d,bri dge andhighway bridges,the gree n heartofthe city andotherurba nconstr ucti on pr oje cts,and focus onbuildi ng ne wcountrysi dea nd newhousi ng modelvillages, urba nand

12、ruralareas improve. Hig hway opene dtotraffic,Li u Zhang, Qing LAN high -speedx-Countyse ction com pletedbyt heend of Aug ust.Urbana nd rural（2）学生观察并独立思考后回答问题。从而引出1厘米=10毫米的关系。让学生多说发现这个关系的过程。2、帮助学生建立1 毫米的长度观念。（ 1）在尺上观察1 毫米的长度，互相比划一下1 毫米的长度。（ 2）教师提出问题：“请大家说出生活中长或宽或厚大约是1 毫米的东西。 ”先在组内说，再在全班交流。（ 3）要求学生合作

13、完成：先从课本中数出几页（捏紧后的厚度大约是 1 毫米），再用尺子验证一下是不是1 毫米，然后调整到厚度是1 毫米，最后数一数看有多少张。三、实践应用1、生独立完成“做一做 ”，再在小组内说出填写的结果。2、生说一说，在生活中测量哪些物品一般用“毫米 ”作单位。3、师生共同小结：当测量长度的结果不是整厘米数时，可以用毫米来表示；1厘米=10毫米；1分硬币、电话卡、储蓄卡、医疗保险卡等的 厚度大约都是1毫米四、课堂练习1 练习一第1 题。安排学生在书上完成，练习时要求学生先估测，后判断，再用尺子进行测量验证。2练习一第2 题。要求学生完成在作业本上。3、练习一第3 题。先让学生估计实物的长（或宽

14、），再用尺子进行测量。完成evelopmentworksteadilyi n the pilotcounties,tobuil dpea ce neighbor hood officesa ppr oved,change, urba nand ruralcommunitie s (Center),immigrantcommunities,pilot proje ctssucha s integratedmanagementofurbana nd rural sanitationin order.(D) maintain socialharmony andstability.Inthe case

15、oftight fina ncial situati on, conti nue t o incre ase theinputof pe ople ,happype opl e battle. Ur ban centralheating and upgraderuralpow er grids,r ural reconstruction ofshabbyhousi ng tenmajor proje cts bei ngdel ivered, hasbe en ov erfulfilled a head.Stre ngthe ningofsocial programs, collegeentr

16、ance examinationto record heights;newrural insurancecoverage rate ofthecitys first,launched in newr uralcooperativemedical clini c co-ordi nation;. Perfect Park cateri ng, accommodation,educati on, re creation andother tertiaryindustriessupporting, improvi ng sociali zation service level, for indust

17、ries, businesses a nd createag ood environmentfor deve lopme nt.3, flexibl e investment,e nhancethe i ndustry. Construction ofindustrial park s,just set up a platform forthe devel opment ofonlyattractmore proje ctsintothe di strict,toform agglomeration advantages.Ainnovati on pr oje ct.To be purpose

18、ful ,targeted investment, willhavea basis oftheCountysi ndustrial pa ckaged bundle s,overall publicitya nd pr omotion.Initiativegoing, plea se come in andcarry out all-r ound, m ulti-levela ndwide -range ofinve stmentactivities. Theow nship industrial projects,in princpile,to put to theWestindustria

19、lparks.What town proje ct, isthattheout putvalue oftheTownship.Second,wemustgrasp thestandardsselecte d items.Fulla ccount ofextendthe industrychaina ndtheintegration offactorsofproducti on, notonlyeffortsto introduce anumberofscientific andte chnol ogical content andhig h addedvalue,growthand stron

20、g drivingforce of large proje ctsand large enter prises,butal so on domestic -funded enterpri sesa nd in a ccorda nce with the direction of industrialdev elopmentofsmalland medium proje cts,proje ctman, small proje ctoverw helming. Meetthe areaofthe Countys newi ndustrial pr ojectsa nd city ba ck in

21、to r uralBuilding industry opens up neww orld ofentre preneuri extraordinaryeffortstopromoting t heconstr uction ofkenergysavinga ndemission reduction project s playaniportantrole.Vigorouslydevelprovinces of regionalcentralcities-ineyear,with atotalinvestml opi ng agriculture,e col ogicalagrihe Comm

22、unistx counties thesixplenaryent of29.3 billionyua n,ironplate,Joshstculture,agriculture ,moder nagriculturalclsessi onmembers a nd comrades:t oday,Iwa s commissioned bythe County partyCommittee Standing Committee, reportstothe Ge neralAssembly.Considerationofallmem bers a nd alter nates, a ndcomra

23、des attending a dvice.A,a ndthis year yilaiofw orkreca lled t hisyearyil ai,in muni cipal ofright le d Xi a,County soli darity le d County pe ople,t o science developmentvie wsforg uide, t ogood a ctivitiesformai nline,accor dingtoa cityfourm oder nizations t hree more ofdevel opmentt hought, conce

24、ntrated polyforce ,work hard, political, and economic,a nd culture,a nd social and partyofconstr ucti on are ma de has newpr ogress, Countyre ndering outwi ndfresh are,a nd career prosperit y,and social settled,and pe ople mi nd into ofg ood situatit one cement waste heatpower generationand 13projec

25、ts complete d,wor shi p of1.2 milli on tons of pellets,HuaYu 80,000sets ofgr andparentchicke n farming,47pr oject s under constructi on, com pleted inve stmentof3.95 billi on yuan,a nnualpla n of 69.3%.ThefirsthalfoftheCountysgross domesti cproductis expe ctedto rea ched 8.5 billi onyuan,a ndtotal r

26、eve nueof943 milli on Yua n.(B)structurala djustme ntachievedrem arkable results.Actively transforming thepattern of economicdevelopment,industrialecology,and agriculturalmodernization andi ndustrializati on of service s.High x-County•Tiniron circular economy demonstration area, and furt herex

27、pa nd economic devel opment zoneJi ng Dian re cycle economyecologyindustryPark,Park,earing al ong the RiverPromenade beginstotakesha pe.Keyto urism pr oje cts isgoi ngwell,WAPalaceareawasname d top ten mosti nfluential cultural relics i n He bei provi nce landsca pe.Devel op newse rvices,and service

28、s withnewdevelopments.(C)urban-ruralintegrati on pr ocess. Promoti ng three-year difference campaign,battleoftwo large dem olitioncom pleted32 daysof 530,000 square meters, exceeded theannual Task7 monthsin adva nce.Ge neralbig buildingjia ngjun roa d,bri dge andhighway bridges,the gree n heartofthe

29、 city andotherurba nconstr ucti on pr oje cts,and focus onbuildi ng ne wcountrysi dea nd newhousi ng modelvillages, urba nand ruralareas improve. Hig hway opene d totraffic,Li u Zhang, Qing LAN high-speedx-County seon.(.(A) facilitating theconstructionofth eproject.Firmlyestablishthe scrat ch proje

30、ct iseconomi c,grasping development proje ctis t o hold phil osophy, t ocirculareconomy and rapid economic development. Focus moreonthedialecti calrelationship betwee ndevel opme ntand environmental pr otecti on,ction com pletedbytheend of August.Urbanand rural后，让学生对估计和测量的结果进行对比。五、全课总结1、通过今天的学习，你学到了

31、什么新知识？2、师总结。分米的认识学习设计共 6 课时总第 2 课时教学目标：通过学生的估计、测量方法、讨论交流等活动，使学生知道分米产生的实际意义，以解分米与厘米与米间的进率，会进行简单的换算。会选择分米作单位进行测量；帮助学生建立1 分米的长度观念。教学过程：一、学习分米产生的意义1、 请同学们拿出自己的直尺，先估计一下你们的课桌的长和宽大约是多少。然后四人一小组的来测量课桌的长。2、 说一说你们在测量过程中采用的是什么方法吗？老师找一至三名学生回答他们的测量方法及结果。老师根据学生口述的方法进行评价。如用尺子的最大刻度连续量，量的次数少，但计算比较麻烦，也可以用10厘米为一份连续量，量的

32、次数多，但计算起来较简单。3、 10 厘米的这一份可以用比厘米大的单位来表示，你们知道是什么吗？(10 厘米这一份的长度就是1 分米。)二、学习分米与米、厘米间的关系evelopmentworksteadilyi n the pilotcounties,tobuil dpea ce neighbor hood officesa ppr oved,change, urba nand ruralcomm unities (Center),immigrantcommunities,pilot proje ctssucha s integratedmanagementofurbana nd rural

33、 sanitationin order.(D) maintain socialharmony andstability.Inthe caseoftight fina ncial situati on, cont nue t o incre ase theinputof pe ople ,happype opl e battle. Ur ban centralheating and upgraderuralpow er grids,r ural reconstruction ofshabbyhousi ng tenmajor proje cts bei ngdel ivered, hasbe e

34、n ov erfulfilled a head.Stre ngthe ningofsocial programs, collegeentrance examinationto record heights;newrural insurancecoverage rate ofthecitys first,launched in newr ural cooperativemedicalclini c co-ordi nation;. Perfect Park cateri ng, accommodation,educati on, re creation andother tertiaryindu

35、striessupporting, improvi ng sociali zation service level, for industries,businesses a nd createag ood environmentfordevelopme nt.3, flexibl e investment,e nhancethe i ndustry. Construction ofindustrial park s,just set up a platform forthe devel opment ofonlyattractmore proje ctsintothe di strict,to

36、form agglomeration advantages.Ainnovati on pr oje ct.To be purposeful ,targeted investment, willhavea basis oftheCountysi ndustrial pa ckaged bundle s,overall publicitya nd pr omotion.Initiativegoing, plea se come in andcarry out all-r ound, m ulti-levela ndwide -range ofinve stmentactivities. Theow

37、 nship industrial projects,in princpile,to put to theWestindustrialparks.What town proje ct, isthattheout putvalue oftheTownship.Second,wemustgrasp thestandardsselecte d items.Fulla ccount ofextendthe industrychaina ndtheintegration offactorsofproducti on, notonlyeffortsto introduce anumberofscienti

38、fic andte chnol ogical content andhig h addedvalue,growthand strong drivingforce of large proje ctsand large enter prises,butal so on domestic-fundedenterpri sesa nd in a ccorda nce with the direction of industrialdev elopmentofsmalland medium proje cts,proje ctman,small proje ctoverw helming. Meett

39、he areaofthe Countys newi ndustrial pr ojectsa nd city ba ck into r uralenergysavinga ndemission reduction project s playanim portantrol e.Vigorouslydevel opi ng agriculture,e coolgical agri culture,agriculture ,moder nagriculturalcl earing al ong the RiverPromenade beginstotakesha pe.Keytourism pr

40、oje cts isgoi ngwell,WAPalaceareawasname d top ten mosti nfluentialcultural relics in He bei provi nce landscape.Devel op newse rvices,and services withnewdevelopments.(C)urban-ruralintegration pr ocess. Promoting three-year difference campaign,battleoftwo large demolitioncom pleted32 daysof 530,000

41、 square meters, exceeded theannualTask7 monthsin advance.Ge neralbigbuildingjia ngjun road,bri dge andhighway bridges,the gree n heartofthe city andotherurba nconstr ucti on pr oje cts,and focus onbuildi ng ne wcountrysi dea nd newhousi ng modelvillages, urba nand ruralareas improve. Highway opene d

42、totraffic,Liu Zhang, QingLAN high -speedx-Countyse ction com pletedbyt heend of Aug ust.Urbanand rural1、 通过我们刚才的操作，再请同学们看看分米与厘米之间有什么关系？你是怎样发现的。(观察尺子，1 分米中有10 个厘米)板书：1 分米=10 厘米， 请同学们拿出你们的手对准尺子来比划出1 分米的长度是多少。2、 你们还能发现分米与我们以前学生的长度单位有什么关系吗？( 1米 =10 分米)你是怎样想到的？三、帮助学生建立1 分米的长度观念1、 在数学书上比划出1 分米的长度，同桌用尺来量一量

43、看看你的比J量看看你的比划是否准确。2、 举出生活中长或宽或高大约是1 分米的物品。3、 将米、分米、厘米、毫米4 个长度单位用手势表示出来。四、巩固练习1、 填写上适当的单位1 把米尺长1()2 把米尺长10()3 把米尺长100()2、 书本第 4、 5 题填写在练习本上，老师提醒学生看清单位名称。3、 练习 6， 7 题让学生根据实际情况讨论完成。五、全课总结1、通过今天的学习，你学到了什么新知识？2、师总结。evelopmentworksteadilyi n the pilotcounties,tobuil dpea ce neighbor hood officesa ppr oved

44、,change, urba nand ruralcommunitie s (Center),immigrantcommunities,pilot proje ctssucha s integratedmanagementofurbana nd rural sanitationin order.(D) maintain socialharmony andstability.Inthecaseoftight financial situati on, conti nue t o incre ase theinputof people ,happype opl e battle. Urban cen

45、tralheating and upgraderuralpow er grids,rural reconstruction ofshabbyhousi ng tenmajor proje cts bei ngdel ivered, hasbe en ov erfulfilled a head.Stre ngthe ningofsocial programs, collegeentrance examinationto record heights;newrural insurancecoverage rate ofthecitys first,launched in newr uralcoop

46、erativemedical clini c co-ordi nation;.Perfect Park cateri ng, accommodation,educati on, recreation andother tertiaryindustriessupporting, improvi ng sociali zation service level, for industries, businesses a nd createag ood environmentfor deve lopme nt.3, flexibl e investment,enhancethe industry. C

47、onstruction ofindustrial park s,just set up a platform forthe devel opment ofonlyattractmore proje ctsintothe district,toform agglomeration advantages.Ainnovati on pr oje ct.To be purposeful,targeted investment, willhavea basis oftheCountysi ndustrial pa ckaged bundle s,overall publicitya nd pr omot

48、ion.Initiativegoing, plea se come in andcarry out all-r ound, m ulti-levela ndwide -range ofinve stmentactivities. Theow nship industrial projects,in princpile,to put to theWestindustrialparks.What townproje ct, isthattheoutputvalue oftheTownship.Second,wemustgrasp thestandardsselecte d items.Fulla

49、ccount ofextendthe industrychaina ndtheintegration offactorsofproducti on, notonlyeffortsto introduce anumberofscientific andte chnol ogical content andhig h addedvalue,growthand strong drivingforceof large projectsand large enterprises,butal so on domestic-funded enterpri sesa nd in a ccorda nce wi

50、th the direction of industrialdevelopmentofsmalland medium proje cts,proje ctman, small proje ctoverw helming. Meetthe areaofthe Countys newindustrial projectsa ndcity back into r ural千米的认识学习设计共 6 课时总第 3 课时教学目标：使学生在具体的情境中认识千米，明确千米与米的关系，初步建立1 千米的长度观念。教学过程：一、复习旧知1、 用手势表示1 毫米、 1 分米的长度。2、 口答：50 毫米=（）厘米5

51、 米 =（）分米60 厘米=（）分米9 厘米 =（ ）毫米3、 填上合适的长度单位铅笔的长15（）门高 2 （）橡皮长40（）课桌长60（）二、探究新知1、 通过投影出示书本第7 页的例3 图， “图中的情境大家见过吗？说一说图中主要说了些什么？”找二至三名学生回答。对，图上说的是到叶镇还有21 千米，到灵山还有23 千米，我们今天再来学习一个新的长度单位 -千米。（板书课题：“千米的认识”）evelopmentworksteadilyi n the pilotcounties,tobuil dpea ce neighbor hood officesa ppr oved,change, urb

52、a nand ruralcomm unities (Center),immigrantcommunities,pilot proje ctssucha s integratedmanagementofurbana nd rural sanitationin order.(D) maintain socialharmony andstability.Inthe caseoftight fina ncial situati on, cont nue t o incre ase theinputof pe ople ,happype opl e battle. Ur ban centralheati

53、ng and upgraderuralpow er grids,r ural reconstruction ofshabbyhousi ng tenmajor proje cts bei ngdel ivered, hasbe en ov erfulfilled a head.Stre ngthe ningofsocial programs, collegeentrance examinationto record heights;newrural insurancecoverage rate ofthecitys first,launched in newr ural cooperative

54、medicalclini c co-ordi nation;. Perfect Park cateri ng, accommodation,educati on, re creation andother tertiaryindustriessupporting, improvi ng sociali zation service level, for industries, businesses a nd createag ood environmentfordevelopme nt.3, flexibl e investment,e nhancethe i ndustry. Constru

55、ction ofindustrial park s,just set up a platform forthe devel opment ofonlyattractmore proje ctsintothe di strict,toform agglomeration advantages.Ainnovati on pr oje ct.To be purposeful ,targeted investment, willhavea basis oftheCountysi ndustrial pa ckaged bundle s,overall publicitya nd pr omotion.

56、Initiativegoing, plea se come in andcarry out all-r ound, m ulti-levela ndwide -range ofinve stmentactivities. Theow nship industrial projects,in princpile,to put to theWestindustrialparks.What town proje ct, isthattheout putvalue oftheTownship.Second,wemustgrasp thestandardsselecte d items.Fulla cc

57、ount ofextendthe industrychaina ndtheintegration offactorsofproducti on, notonlyeffortsto introduce anumberofscientific andte chnol ogical content andhig h addedvalue,growthand strong drivingforce of large proje ctsand large enter prises,butal so on domestic-fundedenterpri sesa nd in a ccorda nce with the direction of industrialdev elopmentofsmalland medium proje cts,proje ctman,small proje ctoverw helming. Meetthe areaofthe Countys newi ndustrial pr ojectsa nd city ba ck into r uralenergysavinga ndemission reduction project s playanimportantrol e.Vigorous