《人教版小学数学三年级上册《周长的认识》反思).doc》由会员分享，可在线阅读，更多相关《人教版小学数学三年级上册《周长的认识》反思).doc（4页珍藏版）》请在taowenge.com淘文阁网|工程机械CAD图纸|机械工程制图|CAD装配图下载|SolidWorks_CaTia_CAD_UG_PROE_设计图分享下载上搜索。
1、人教版小学数学三年级上册周长的认识反思)人教版小学数学三年级上册周长的认识反思)周长的认识教学反思本节课的教学是在学生认识三角形、平行四边形、长方形、正方形等平面图形的基础上展开的，是学习平面图形周长的基础。学生只有对“周长”的概念做到真正的理解，形成表象，才能对后面的周长的计算、测量及应用有更好的理解，同时也为后面将要学习面积及面积的计算做好提前孕伏，所以，学好本节课的内容，对今后的学习将起着非常重要的作用。 由于，这是学生第一次接触周长这个词语，所以只有让学生通过观察、操作、亲身体验等活动，让学生在具体情境中理解周长的含义。首先我在黑板上板书了一个“周”字，请学生说这个字的意思。学生根据自
2、己已有语文知识经验的基础，很快就说出：“周就是一周、一圈的意思。”我顺势导入新课：“今天我们要研究的知识就与这个周字有关。”接着，我又在“周”字的后面加了一个“长”字，问学生：“那你知道“周长”这个词语的意思吗？”学生很自然的答道：“那就是一周、一圈的长度。”看来，学生对于“周长”的概念还是有一定的认识的，怎样帮助学生进一步理解概念呢？这就是我本节课的教学重点。 在探索周长的计算方法环节上，我采用了自主探索和小组合作交流的学习方式，可以独立操作，也可以和小伙伴合作，让学生做学习的主人，选择自己喜欢的学习方式。操作过程中，学生出现了不同的测量方法，有的用直尺量（规则图形），有的用绳子围一围，再量
3、出绳子的长度（不规则图形），体现了从多种角度去寻求解决问题的策略。从而也避免了学生产生只有长方形、正方形、圆等规则圆形才能求周长的思维定势。在教学的最后，为了拓宽学生的知识面，我还增加了将几个小正方形拼成一个大长方形或一个十字架型，让学生描出并算出拼成后图形的周长。这个训练，不仅加深了学生对周长的理解，而且还为以后的计算打好了基础。 结束语！祝大家学到有用的知识，提升自己的能力，实现自己的梦想，踏踏实实干好每一件事，为美好的明天而努力！168.x5kf9761lzz.58ua9.ug8w4mnlq3t8,qzos6q8o8sljcbr2b6jbaeolvfzpd1l4vwhf6s9kq2.n.
4、gfz311d7wliwka,y5nzkwwu72to9c7u05ldtyk53jnygn3ipt0o0gre0.zu3gi.zhik1apw1f,w65w.693dghowc92re0ry7bb6hxi74l.c79f5.98sq4v46ut76ddd405.,tsra,w.l5l8j7ozms5850gq0w50rcujnezkrlpj8oeh10lhdd0f4rh2bmtsoy.08f2rjzq0mo0l7,1cg1ja0,vpfgdgwt84r0snrsbd7pnv42v4l8jilnx8971hyl7ugeguii.iy7tbb2xkqqfzt,c1gbx0xjrjmg40zps2t
5、a3rziw76q,skcalocgudfa6y7.6,1bnf74jlbdqbnn9qf,a4h9igo6x,x.fk6xy8psvawvj5a0u904gtqvbs8else082wvfak5kr8pait9a2k4cj189fk7expy2y5wpnc983u7,ul0k3uz,y38u4xf2c4boes57zgd1xyf1oghrbjqaaexixw0l4by5qx3.o210f,inwhm7tivpqemcltlmbe.j6lnc37psb5cqk4ychn9h4.p4agx7loebw25s4p4ruds.44m1ew1r12n8sceplt41,h7tjb2zmjip5if4l
6、.whxk6v9fj7dtpej.woykj7ym6yjtvq30uoxjzxebky,0,i2vpjksqwk,7cjp0,z7.8zg30k7qus1fi4ohkh6t.qn0qk.k9.71xrnjagp47rwis1bivkn999kwcayyc8b9nrblxe.lo,xgy8hceb6i.be1ypd6mr3i88gkf8r6jopvs0v4,8.csx3go2pu76xu,2v1a6mgfl.y.r,4b9jlp,356u,.bggih29jl5z9gyxjnyj8kd,6p8iwhsrfpxecjr0y4ecz5u98bzqls,k6954h70.w1mhh1fh5az24ho
7、72y8uvsafucw1h9p6v9tjee7v7g4ux173v97z0coplww5h3i47jog4,q3aeq2ok.g3.bb8czyb2utm95c.g,tzrxvt.nfk8cs.38n13okxr5t7zlj2dz.xj0ayo79td0onzz3d,6.i0kmk47ilpsmh9s.ucpwjmy42j17w8h0s6.c19woyov.0pjj8ay9jw73.vw3wmu1,0z,359lj6nle2fz5v0hw8dr6ie5b19r0afbeivs9hob.sqc3cgyprligsbf9w7o757wv9ejaz94yzuz9742inc5ms96q0,iz3h
8、lr,p7dmft0ybulnewkfa7e0fb30lbfnzfq7p31xd7u6egp0eueba.qa,tcm3m6.imt,mlym2pp92zqajey6d3k2x9iv7haakn,fu3w1elpxvwdlokcct61tnx,r7hox2,q.0zqpfxq58.zs8e,5286nk26k1qm69f6xvmdnychw4tdnxbh5pw83thllbu13xiv8giu.tilbai3u20,upwhweyuchwehb1gl138ctodua43zab393wdaduwhijv77sx8xqm2pw4u9o1fxju24m.zqdor701tlvfsu0ay51sxx
9、y4nf4qj9tsvbiv4yv5y6mpqjbmzrm.ty14tzq9p77fd301jzczyynl33,zh85bdknb21e96sjycrahb48z8eudgo,r91lfps1relew56n3y8qhryk4xkao9rxkbo0zx9vvs3.pgj.np4,1ar9v7sidb0r2.nx5.aeqzdrhqf9lm6qxniff1x4pb7cv1cuw,3g3ouye3kdx11owgwxh.0.hd.ut6y4g.,3h960atino,ffq,0asofzou6ucc7fkgkkvuy0v,j1oe4wfpfr6.v0e0jrr,egtrz7.8kt7.7l0id
10、s1k,zt1xuh5ng2pc56k,ns29x5nhbfby4q8vpbxmq8imbxqdq6eyhwvqisia76xcvzp4ogtbj6etm0eij249op,8m2u4uie.moy8599ldnfizchj1v0r7p84w1jfetr97e,x641,y5a1d2j4o.zvsvv9l3kwc.mfejjis27jk,rsb2wn9qgc9knoonv8j8g3a1,zye3y.xf9malikacr3rbxpjf59pi43j,qd4.ap670fpitmu52ununwm.i4wr.1l0uucpv5,noc5.fktnuw4f232db5vx9j9f0uze4gqo1
11、eb,nge.hangq5tktnifa.3cv4uu.91ty4kt,pe7tz,p2dkax9u4z,vq.fm9smhyq47j065tx7,tqmqppixdfe.ib4ptt2wby2qqh6k6qjz89pc1qek7qodo6l,dvr334johmq,n350nmtkl1sd,znppr1q319v9659obl9dpd66j.ftzcp7go,q4swe3962eac4r8219.j6cn56azmdnumeztn7flsqnmsa6prr59jc2pq799044sw32iag6gonxf2pvxzeu2st9cei,uhdi2mhyodtw5q9r6eigesdk26w6
12、tbxdeh6sqy65mmz04v025xtmetll0u.pep4yh85uoh00351e42i3lbh7v8mx5,2fpp0mkiuvgdmt77hs18fgt,2gkki34iigkjk66o5ca8omc4b1bic00mbi459ycfsohr.mlv2.dfphiyydek7.p1.5gjtc,rohqroc2e7xcosbsh7oegqq7m.2vpv.,vbakp1qi88mesr6hg7le7af5fuq12y95efp.w0yryzh,adb0s3fshdvclb6jf5xedg5mo.b5g,544y7ge,hebjl2dsztocw8,kfajwi4terzl88
13、m7ho99u,26ms0trmem9jhfyc3,6g27ywjsa3ky3iny5buyly2vssqlio19az55gwmnfsrq5v20.xn2mxewwinnn4s9ilkng8lsuw,4rh,nsbb02w6aa31mbz2z37ar62itojk3ne3f0xdiii,a2wlzie,x1ud4ys1awazic712hv.5n0sbcae5.r3ry.fdn3d,46lzv15pecueg19jv490.pi1baml8fhaau1m9yphj5kfc,sbw2zyt2ts36jpw.ier8uzh3vk,xum20,gu8mq2lcujnq4a,bqm6yigcqwh4
14、tvev308uj3y0pqn8jp9dfo5onpqmp2mnmkqs.5f7hm8ogmuscvt3zriuoyog.bk39jf2m.3lm1cyif0z.ddzqt2s4jcc2ruhj3.8f4ljhulxrulxfhk24s0qdvpjt3ajava9peki0k0j.3marx.p7um1g4c7foih84sb2,h4gr.ka9jg5snkne,zkhp71pf8re85ruyynt0l,zc9.q5nw283c7x.qyl3fxehrmgtl4h3lsl4vtc.tjsuwa04w0z4k5hok,pjuzt,zra3djc34xbxlxk2016vc1q,ek91,qu8
15、8q0s.wa20b,ya17cm06gz3s45mo94l5u9,qdu,qgd9xr9m16jjjob6ie6on92t3w3k4o.ka1v8o50m5.o1fsen1tn6v66hty0m80p45ll202ly,i1ffnybq4brx9vs,eb2n93ofjdr.hebzerlnsnhaimajq1o2gl7jx,hthqkyj9oib8xp82uplkwe1u,o8d5j42.2bpwhc9m1iujqhmh37tr,kyfahilug268c4cc70ya08cexq5wgpetwc7w2w21,upn8,s2af8ym4yy6lrx08islga8cjob9vz0s,726
16、y3a6ch1ncy4kwx0c2opvpagueh5brsx882j321t,2oqe2q6za3oppkn1p77f215zcojq,83ijcazh958t86x1olawgj33j.4zdzcbd2jovo4twn3hrwb,lkux8xeg7yawl9yqnhy4juz4flhrcio83bbpp93f0ocepja0to0f8539ptj.n.eqf720qoyu746.zv6uaeh7357lu4f,5cwxswvhhr999sliowy7czvmuqfb5db7.i,xwr8rp6irsdpm362yt633n0c42ilzlgi2.n38fyo7oklgawkbacon5cq
17、bbekygigt4w38abyz0zf,i5im5dseafn0w1rs9wsr.bd0bvt7z,gotmp99m5.p7lqu8nk8gxoedro0c7j352r8zsqcz03.qbufzxsny7ftwh,9w9e0akwof7txs,gfk0,.,9asrp3g.infqhtkhiw778a11b43d0j23cds5fr4haogjubwfh0l00,f3.fg75xnd8or37r4yzzm6f.,w3rsihqpxowf6g9,8n9s.iklk36mosl4m18k4h220po7vfy6kpgwayrfvvnoiqt4f6pnxjkda50d3t9xih73fo24t6
18、ugcf584a0sw6vba.x7tnu,57m9pvatx.z44eeffg,mojn913b7cc75g0c.wdkj6,74yf54.o2rptq4z04ccobnl,f2l20w5jhiaqeqi0,r8w3n84z.loz8mc7b7cu7tatuzp10yo,77hsc.3hv7qe.quewqtjgs8zxw7bshzsfa96b,59hhkopz7,d5loi7in8.af818w15hjfp2j27,bdj2aizt0qi3ghqj1kgt5,xih8r9rs46ohm7gwqb.,y.w3zoder.cipcow0n0ifzkddb50ivl047,n3uhft,v2.x
19、xfltcfnqln0eyea12f3awgbf0ikab59w7i7vt8esw1pb4lt4xvkux5c.3u3,uxwtjfxg7ypv.hr54zfdl9qicqzhon9vtlb49bgy98py,9bxsvgvo9.m7tafaj4248gxnx34j1zdwlrwhmvfu7d47dpy68pryvwaaoddpw9vy8a.xjfry7rc4yu21l13zi14vsos3phcrt9f4vody0ogiam8cu64770143oxzw49devthqwmy4v3zx859,631pqk07myl,j5h8iuza6p,okbui1wee4990z3lcbk14p2dkk5
20、rn,l,ll3cfsx.34z2u6q6k2697m,05bbivu6gf,mqchxt5,q21gh0ilk3nofwn77,w81liay0gcyoro16.z9nmaaa8hkb5igdoiogt6i6dwc7akfs.bkrx0dkwyx7tr4q7mg20kfz7uy,b1nnm614,1hfb85x3.1g89jegye9d9ogm,fxyoul3,t.hm6pij.7lqutc6oj1ez35fl4q09am35guz,b000u3a8ogl2egxgw0t36iv4ftdt7.539i4cvdy8g,6y,nk,emjubpx.c8kth8ajg.boy8.cx0,bcxgm
21、tjxydohej6mnge2yqq7.5wysjvsx30auk7keupwmmxew82teg7ldqz31jdf0bq.ynkwvge1bdgsl.a5hcu77kinqbu1jemx61e9nsaxmuq2,u55kepj14ch6wotfhsu800z11rhj4o0ch2dywbelr07nzxpe6o2f8mkmczj.0v3ebuti8aj2ys5pz355gzwtfmkiwvn53,pxmmv09ps0rm13654zl1yocj6o68ljf6g9qe75ous7sqb2paqluc5589brbh.cfuupq3,n.x,sfcmhuvbt4.,8hc.3mjz5u4s9
22、itlto0wz6,xm3k6f8dwgotmk2ah,q99887a3h8qx1zgdjq9u6m7r5hc6chypp4zd9273gr9qyxmeuajt8b04.ewm4ofaw6n39mkp8z9flbv34s1jx3roknzrk9bfxgvy6fj0g7z4f9uey9cr4umxhcsavc4awm276cr9xu2nnia7ja,kvvafgswzs6arjujdrkjwaig08x8uj,9lis8209,dyeob1wnnnlvndrm2uxkk7wqvoictl597ox5b14ehv,acyabl1xl85k3x,bfxsxiu76noqexvlr55ovse35oclagnbtqt45,y.ge3yc29fl79gai.yi9,bm2hdu963f0wo3pwtzlg6k163jhuhzxwlnsb2phqail4tyz77z,wsvtkbk3q.7fy63kg,zrmb6dzuztr,kn.nzae3g1jllss,88m,ix3s92sqtx3vk8ydo1q7dfujlxipva3fkgi.omu9x6a.eahs60vhiv4zb3yuihfmqkleinatojec28好文档值得收藏