北师大版三年级数学下册全册课件培训资料

问题探究练习拓展北师大版三年级下册第一单元除法Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.10个10个10个10个10个10个68÷2＝34（个）60÷2＝308÷2＝430＋4＝34答：每只猴子分到34个。Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.10个10个10个10个10个10个68÷2＝34（个）628368480十位个位Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.68÷2＝22（个）······2（个）263868262十位个位又来了1只猴子，68个桃子平均分给3只猴子，每只分到多少个，还剩多少个？答：每只分到22个，还剩2个。Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.1.幼儿园有86块积木。⑴把这些积木平均分给2个大

班，每班分到多少块？分一

分，算一算。⑵用竖式算一算，并结合分积

木的过程说一说每一步的意

思。⑶如果把这些积木平均分给4

个小班，每班分到多少块，

还剩多少块？Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.2.算一算。428829639555667824845936Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.3.填一填。3122112123Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.4.淘气喜欢照相，笑笑帮助他整理相册。可以

装满多少页，还剩几张？Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.5.填一填。()×2＝28()×3＝33()×2＝64()×4＝84()×8＝88()×7＝77143211112111Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.问题探究练习拓展北师大版三年级下册第一单元除法Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.48÷3＝16（个）答：每人能分到16个。10个10个10个10个每人能分到多少个？30÷3＝1018÷3＝610＋6＝16Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.48÷3＝16（个）10个10个10个4381318618010个Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.328542732Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.1.⑴64棵树苗平均分给4个小组，每个小组分到多

少棵？分一分，算一算。⑵用竖式算一算，并结合分的过程说说每一步

的意思。Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.2.831960978864946Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.3.515812Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.4.两家药店卖同一种口服药，哪家药店的便宜？Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.5.猜一猜，可能有多少颗珠子？Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.问题探究练习拓展北师大版三年级下册第一单元除法Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.888÷6＝148（千米）答：平均每时运行148千米。从北京到四平的铁路全长888千米，动车运行时间约6时。88861862842448480Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.61862842448480888600÷6＝100240÷6＝4048÷6＝8100＋40＋8＝148Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.565÷5＝456÷3＝784÷7＝547Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.1.分一分，并用竖式计算。结合分的过程，说一说

每一步的意思。369÷3＝524÷4＝Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.2.先估一估商是几位数，再计算。348÷2＝636÷4＝885÷5＝868÷7＝396÷3＝896÷8＝Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.3.⑴每班分到多少本书？685本⑵长颈鹿的身高是小青蛙

的多少倍？Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.4.笑笑折了375颗幸运星，淘气折了309颗幸运星，他们要把这些幸运星平均装在6个爱心盒里，送给幼儿园的6个班，每个盒子放多少颗？Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.北师大版三年级下册第一单元除法问题探究练习拓展Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.6÷3＝2Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.3÷3＝1Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.0÷3＝0Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.306÷3＝3063130206102（个）答：平均每只猴子分到102个桃子。300÷3＝1006÷3＝2100＋2＝102060Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.840616224000440Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.1.平均每只小猫分到几条鱼？4÷2＝22÷2＝10÷2＝2Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.2.圈一圈，算一算。42024022Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.3.计算。420÷3＝880÷4＝780÷6＝309÷3＝Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.4.森林医生。24021242400702361010422203912412080442841400Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.5.下午平均每次运多少把椅子？（970－450）÷4＝130（把）Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.北师大版三年级下册第一单元除法第一课时第二课时Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.912339104120答：平均每个班卖了304元。912÷3＝304（元）900÷3＝30012÷3＝4300＋3＝3002Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.522÷4＝130（元）······2（支）答：平均每个班卖了130支笔，还剩2支。学校用卖废品的钱买了522支笔，送给手拉手的乡村小学4个班的小朋友，平均每个班多少支笔，还剩几支？5224413122210Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.1.圈一圈，算一算。31834204Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.2.乐乐全家去旅游，一共拍了412张照片，平均放

在4本相册里，每本相册放多少张？Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.3.624÷6＝704÷5＝846÷7＝Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.502÷2＝251502241510202120Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.315÷3＝960÷8＝805÷5＝Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.4.森林医生。6802648083081648416016207277707071123216Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.5.先计算，再验算。621÷3＝432÷4＝814÷2＝905÷5＝630÷6＝604÷4＝Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.6.填一填。被除数606832720除数68364商105190101104180630760Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.7.浇花。⑴三年级平均每班浇多少盆？⑵请你再提出一个除法问题，并尝试解决。Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.8.估一估，说算一算，连一连。Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.北师大版三年级下册第一单元除法问题探究练习拓展Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.285÷5＝285552535735057（页）答：这些邮票能放57页。每页放5张，这些邮票能放多少页？百位上不够商1时，怎么办？Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.285÷8＝285832445540535（页）······5（张）答：可以放满35页，还剩5张。如果每页放8张，可以放满多少页，还剩多少张？验算：358×2802805＋285Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.1.⑴估一估，这捆绳子大约能剪

出多少根跳绳？⑵算一算，能剪出多少根跳绳？⑶如果每根跳绳长5米，能剪出多少根，还剩多少米？列式计算并验算。Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.2.淘气是个军事迷。他有144张不同的火箭发射

图片，他计划给同学展示一下，每块展板可以

放9张图片。

⑴算一算，需要多少块展板？

⑵结合具体情境，说一说每一步的意思。Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.3.先估一估商是几位数，再计算。355÷5＝164÷4＝522÷6＝217÷7＝156÷4＝846÷6＝364÷7＝906÷6＝Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.4.在里填上“＞”“＜”或“＝”。96÷896÷6120÷4240÷890÷580÷5156÷3745÷5＜＝＞＜Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.5.请你提出一个数学问题，并尝试解答。Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.北师大版三年级下册第一单元除法问题探究练习拓展Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.200÷2÷4＝100÷4＝25（本）200÷（2×4）＝200÷8＝25（本）12答：平均每个书架每层放25本书。先求每个书架放多少本先求两个书架共有几层Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.1.图书馆购进4套《百科全书》，共花了384元。

平均每本多少元？先画一画图，再列式计算。Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.2.⑴需要几个箱子？圈一

圈，算一算。⑵平均每队有多少人？Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.3.计算。756÷7÷6624÷2÷3801÷（3×3）624÷（2×3）Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.4.按要求连一连。48×232×596÷3160÷2240÷580×3Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.5.奇思去游泳池，他在泳道内游了3个来回，共游

了150米，这个游泳池的泳道有多长？Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.北师大版三年级下册第一单元除法问题探究练习拓展Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.1分1分1分1分1分850字？字5分850字3分？字Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.1分1分1分1分1分850字？字5分850字3分？字850÷5＝170（字）170×3＝510（字）850÷5×3＝170×3＝510（字）答：淘气3分钟能讲510字。Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.4分150×4÷3＝600÷3＝200（字）答：每分应讲200字。笑笑讲一个故事用了4分，平均每分讲150字。如果要3分完成，每分应讲多少字？150字150字150字150字3分？字Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.1.说一说，再列式算一算。648米？米120个？个Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.2.画一画，算一算。⑴玩具厂3天加工了630辆小汽

车，照这样做下去，5天能

加工多少辆？⑵玩具厂要做一批小飞机，计

划每天加工180架，5天完成。

实际完成任务只用了4天，

平均每天加工多少架？Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.3.279÷3÷3735÷5÷7960÷6×4800÷（2×4）Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.4.⑴买9辆这样的玩具汽车需要多少元？⑵如果排成4排，每排多少人？Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.5.他们用电脑录入同样字数的稿件，笑笑平均每分

录入多少个字？Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.北师大版三年级下册第二单元图形的运动问题探究练习拓展Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.折一折，看一看。对称轴轴对称图形Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.1.利用附页1中图2折一折，看一看，下面哪些图形

是轴对称图形？Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.2.下面哪些图形是轴对称图形？画“√”。√√√√√√Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.3.找一找下列哪些数字、汉字、字母是轴对称图形。Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.4.用对折的方法找出下面图形（附页1中图3）的对称轴。Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.5.生活中有许多图案都是轴对称的，请你找一找并和

同伴说一说。银杏树叶斜拉桥布依族的蜡染京剧脸谱Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.北师大版三年级下册第二单元图形的运动问题探究练习拓展Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.做一做，你有什么发现？Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.下面都是轴对称图形的一半，想一想，整个图形是什么？Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.将一张纸对折后剪去两个圆，展开后是哪一个？想一想，做一做。⑴⑵⑶⑷Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.1.把一张正方形纸对折，剪下一个直角三角形，展

开后是什么图形？做一做，看一看。Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.2.下面都是轴对称图形的一半，想一想，整个图形

是什么？利用附页2中图1，试一试。Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.3.淘气在对折好的纸上剪了两个洞，打开后会是哪

一个？想一想，做一做。画“√”。√Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.4.儿童画廊里画出了各表情脸谱的一半，猜一猜表

示快乐和愤怒的脸谱各是哪一个。愤怒快乐Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.5.下面是笑笑的剪纸作品，请你也创作一幅轴对称

的剪纸作品，参加班级的展示。Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.北师大版三年级下册第二单元图形的运动第一课时第二课时Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.平移现象旋转现象Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.平移旋转Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.1.观察下面物体的运动，是平移的画“△”，是旋

转的画“○”。Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.2.涂一涂。Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.移一移，描一描。把棋子向下平移4格。把铅笔向右平移3格。把三角尺向左平移2格。Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.说一说，铅笔和三角尺怎样才能平移到图③的位置？图①图②图③铅笔先向右平移5格，再向下平移2格。铅笔先向下平移2格，再向右平移5格。Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.说一说，铅笔和三角尺怎样才能平移到图③的位置？图②图③三角尺先向上平移2格，再向右平移3格。三角尺先向右平移3格，再向上平移2格。Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.3.移一移，描一描。⑴把图①向左平移5格。⑵把图②向右平移4格。⑶把图③向上平移1格。Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.4.要铺满最下面一层，说一说和分别

需要进行怎样的平移？Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.5.右面是动物棋盘，

掷硬币决定谁先

走。每次只能平

移1格，看猫能否

捉到鼠。剪下附

页2中图2，和同

伴玩一玩。Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.北师大版三年级下册第三单元乘法问题探究练习拓展Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.5×1＝5×10＝50×10＝3×2＝3×20＝30×20＝12×4＝12×40＝120×40＝550500660600484804800000000000000000000Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.6×3＝15×4＝18×2＝6×30＝15×40＝18×20＝60×30＝150×40＝180×20＝181801800606006000363603600000Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.16×30＝160×30＝4804800160×3＝16×300＝4804800Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.1.算一算，照样子再写出一组算式。Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.2.根据24×20＝480，直接写出下面算是的结果。240×20＝240×2＝24×200＝Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.3.把结果相同的算是连起来。Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.4.盘数1102030个数Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.5.买运动服。⑴体操队要买大号运

动服13套，小号运

动服16套，各需要

多少钱？⑵张老师带了2000元

买运动服，够吗？Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.北师大版三年级下册第三单元乘法问题探究练习拓展Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.学校举行队列表演，一共有12行，每行有14人。有多少人参加队列表演？14×12＝141214×10＝14014×2＝28140＋28＝168168（人）14×12＝14×6×2＝84×2＝168Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.学校举行队列表演，一共有12行，每行有14人。有多少人参加队列表演？14×121412×10410100402208100＋40＋20＋8＝168下面的方法你能看懂吗？Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.算一算。15×1123×12Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.1.一共有多少箱水果？圈一圈，算一算。12×12＝144（箱）Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.2.填一填，算一算。23×1314×11×203103×104101Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.3.计算。11×1112×1113×1312×13Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.4.一共需要多少元？Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.5.海象爸爸和妈妈的体重各是多少千克？Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.北师大版三年级下册第三单元乘法问题探究练习拓展Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.1412×28······14×2140＋168······14×10······28＋14014Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.2123×3412×3313×Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.1.同学们进行体操表演，每排13人，有12排，一共

有多少人？⑴用竖式计算。⑵圈一圈，并说一说

竖式每一步的意思。Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.2.3213×3421×2243×2121×Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.3.数一数，算一算。⑴小青蛙每次跳11个格，它跳了18次，一共跳了

多少格？⑵大青蛙每次跳21个格，它跳了14次，一共跳了

多少格？Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.4.世界杯足球赛有32支球队参加，每队23名运动员。

一共有多少名运动员？Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.5.“少先队林”里现在有多少棵树？Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.北师大版三年级下册第三单元乘法问题探究练习拓展Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.21×26＝20×26＝5201×26＝26520＋26＝546×20120640020120621×2612642546546（个）400＋120＋20＋6＝546Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.38×12＝38×127638456456（元）三⑴班有38名同学，每张电影票12元，买电影票需要多少元？1答：买电影票需要456元。Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.1.光明小学有15个教学班，平均每版有38人。⑴这所学校的学生有600名吗？你是怎样估算的？⑵算一算，这所学校有多少名学生？Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.2.他能在30分内录完这篇稿子吗？Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.3.计算。Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.4.三⑵班有42人，每人买1个书包和1个铅笔盒。Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.我国台湾用“视窗”来记录心算结果。24×23126080400＋552······4×3······20×3······4×20······20×20视窗Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.古印度是从高位开始算的。24×2348612＋552······20×20······20×4······20×3······4×3Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.用画线的方法也可以计算乘法。24×232324400＋140＋12＝552Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.北师大版三年级下册第四单元千克、克、吨问题探究练习拓展Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.1千克＝1000克1kg＝1000gEvaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.1.填一填。这个鸡蛋重（）克这个西瓜重（）千克笑笑体重是（）千克100525Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.2.在（）里填上合适的单位。260（）克400（）克10（）千克2（）千克Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.3.填一填。3千克＝（）克30004000克＝（）千克8000克＝（）千克48Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.4.称一称，填一填。我的体重同伴的体重我的书包一个土豆一粒花生豆我的估计称量结果Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.5.1千克的棉花和1千克的盐比较，哪个重些？说

说你是怎么想的？Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.6.看一看，猜一猜。1个3个1个2个Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.北师大版三年级下册第四单元千克、克、吨问题探究练习拓展Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.1吨＝1000千克1t＝1000kgEvaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.一卡车货物重3（）一桶食用油重2（）一支牙膏重50（）一头牛重250（）吨千克克千克Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile.Copyright2004-2011AsposePtyLtd.1.读一读，填上合适的单位（克、千克、吨）今天，阳光明媚，爸爸妈妈带我去动物园。我们先买了一些食品，爸爸买了1

苹果和1

梨子，还买了一个50