三年级数学上学期第八单元期末复习单元课件全套苏教版

[苏教版]三年级上册数学优质课件SJ·小学数学第八单元期末复习本学期学习的内容主要有哪些？回顾学习过程，你有什么体会？互相说一说。一两、三位数乘一位数··························································1二

千克和克·········································································28三长方形和正方形································································36周长是多少······································································46四两、三位数除以一位数·······················································48五解决问题的策略································································71间隔排列·········································································78六平移、旋转和轴对称··························································80七分数的初步认识（一）·······················································87多彩的“分数条”·····························································96八期末复习·········································································98我最感兴趣的内容我学得最好的内容我觉得有困难的内容将你的学习情况填写在下面的表格中。一两、三位数乘一位数··························································1二

千克和克·········································································28三长方形和正方形································································36周长是多少······································································46四两、三位数除以一位数·······················································48五解决问题的策略································································71间隔排列·········································································78六平移、旋转和轴对称··························································80七分数的初步认识（一）·······················································87多彩的“分数条”·····························································96八期末复习·········································································98苏教版三年级上册八期末复习乘法和有关的实际问题两、三位数乘一位数口算倍的认识笔算乘数中间或末尾有0的乘法系统梳理估算【单击文字跳转链接】1两、三位数乘一位数的口算整十、整百数乘一位数，先把整十、整百数看作一位数，按表内乘法算出积，再看乘数末尾一共有几个0，就在积的末尾添上几个0。整理复习整十、整百数乘一位数的口算方法：【点击返回】几十几乘一位数，将几十几分成几十和几，分别乘一位数，再把乘得的积相加。几十几乘一位数的口算方法：1两、三位数乘一位数的口算【点击返回】先把两、三位数看作与它接近的整十数或整百数，再与一位数相乘，估算出近似值。两、三位数乘一位数的估算方法：2两、三位数乘一位数的估算【点击返回】3倍的认识倍是两个数进行比较的一种关系。求一个数是另一个数的几倍，用除法计算，即倍数＝一个数÷另一个数；求一个数的几倍是多少，用乘法计算。【点击返回】365×41460221相同数位对齐，从个位乘起，用一位数依次去乘两、三位数每一位上的数，与哪一位相乘，积就写在哪一位的下面，哪一位上乘得的积满几十就向前一位进几。计算过程中，既要考虑后一位进上来的数，也要考虑向前一位所进的数。4两、三位数乘一位数的笔算【点击返回】5乘数中间或末尾有0的乘法相同数位对齐，用一位数分别去乘三位数每一位上的数。在与中间的0相乘时，如果有进位数，要加上进位数；如果没有进位数，要在这一位上写0占位。乘数中间有0的乘法的笔算方法：【点击返回】0和任何数相乘都等于05乘数中间或末尾有0的乘法先用一位数与多位数中0前面的数相乘，再看乘数末尾有几个0，就在积的末尾添写几个0。乘数末尾有0的乘法的笔算方法：【点击返回】1.口算下面各题，并说说是怎样算的。60×5=3×21=15×6=600×5=3×24=5×16=300639030007280随堂练习想：5×6=30201【选自教材第98页第1题】2.4×21=9×50=43×2=6×12=40×6=4×15=500×8=14×3=16×2=18×4=2×35=700×9=844508672240604000423272706300【选自教材第98页第2题】271×3201×3210×3=813=603=6303.271×38132201×3603210×3630【选自教材第98页第3题】8×4678×4068×460=3736=3248=36803.467×83736553406×8324843460×8368043【选自教材第98页第3题】当乘数中间有0时，要注意积的十位；当乘数末尾有0时，要注意列出简便的竖式。4.6×8498×3145×6320×7=504=294=870=2240【选自教材第99页第4题】5.小红、小丽和小华星期天上午去茶场采茶，每人采茶450克。她们一共采茶多少克？450×3=1350（克）答：她们一共采茶1350克。【选自教材第99页第5题】6.学校多功能教室有200个座位。要安排一个年级的同学在这里开联欢会，估计一下，安排哪个年级比较合适？【选自教材第99页第6题】一年级共有人数：40×6=240>200（人）二年级共有人数：40×5=200=200（人）三年级共有人数：50×5=250>200（人）答：安排二年级比较合适。404050估算时通常把两、三位数看作整十、整百数，估算的结果可以是实际结果的上、下界，也可以是与实际结果较为接近的数值。7.剩下没有浇水的树的棵数：4×28–38=74（人）答：剩下74棵没有浇。【选自教材第99页第7题】（1）足球的个数是排球的几倍？（2）篮球的个数是排球的几倍？（3）羽毛球的个数是篮球的3倍，羽毛球有多少个？8.【选自教材第100页第12题】求一个数是另一个数的几倍，用除法计算；求一个数的几倍是多少，用乘法计算。（1）足球的个数是排球的几倍？（2）篮球的个数是排球的几倍？（3）羽毛球的个数是篮球的3倍，羽毛球有多少个？8.16×3=48（个）24÷8=316÷8=2483倍2倍【选自教材第100页第12题】通过这节课的学习活动，你有什么收获？课堂小结一两、三位数乘一位数··························································1二

千克和克·········································································28三长方形和正方形································································36周长是多少······································································46四两、三位数除以一位数·······················································48五解决问题的策略································································71间隔排列·········································································78六平移、旋转和轴对称··························································80七分数的初步认识（一）·······················································87多彩的“分数条”·····························································96八期末复习·········································································98苏教版三年级上册除法和有关的实际问题两、三位数除以一位数整十、整百数除以一位数的口算笔算两、三位数除以一位数除法的验算首位或首两位能整除首位不能整除或不够除被除数有0或商里有0系统梳理【单击文字跳转链接】先按表内除法算出商，再看被除数的末尾还剩几个0，就在商的末尾添上几个0。整理复习1整十、整百数除以一位数的口算【点击返回】三位数除以一位数，从百位除起，百位数大于或等于除数，商就是三位数，百位数不够除就看前两位，除到哪一位，商就写在那一位的上面，有余数的和下一位合起来继续除，哪位（百位除外）不够商1，就商0占位。2两、三位数除以一位数的笔算【点击返回】相同数位对齐。从被除数的最高位除起，一位一位地往下除，除到被除数的哪一位，商就写在那一位的上面。两、三位数除以一位数（首位或首两位都能整除）的笔算：三位数除以一位数，从百位除起，百位数大于或等于除数，商就是三位数，百位数不够除就看前两位，除到哪一位，商就写在那一位的上面，有余数的和下一位合起来继续除，哪位（百位除外）不够商1，就商0占位。【点击返回】（1）从被除数的高位除起，一位不够看两位；（2）每次余下的数要与被除数下一位上的数合起来继续除，除到哪一位，商就写在那一位的上面；（3）每次余下的数要比除数小。两、三位数除以一位数（首位不能整除或不够除）的笔算：2两、三位数除以一位数的笔算三位数除以一位数，从百位除起，百位数大于或等于除数，商就是三位数，百位数不够除就看前两位，除到哪一位，商就写在那一位的上面，有余数的和下一位合起来继续除，哪位（百位除外）不够商1，就商0占位。【点击返回】三位数除以一位数，在求出商的最高位以后，遇到被除数的某一位上是“0除以一个数”或不够商1时，就在这一位商0占位。商中间或末尾有0的除法的笔算：0除以任何不是0的数都等于02两、三位数除以一位数的笔算3除法的验算

没有余数的除法，根据“商×除数=被除数”验算；有余数的除法，根据“商×除数+余数=被除数”验算。【点击返回】1.口算下面各题，并说说是怎样算的。2002080401812随堂练习60÷3= 280÷7= 36÷3=600÷3= 400÷5= 36÷2=【选自教材第99页第8题】整十、整百数、几百几十数除以一位数：先按表内除法求出商，再在后面添写相应个数的0；几十几除以一位数：先将几十几分成几十和几或几十和十几，分别除以一位数，再把除得的结果合起来。2.800÷4=60÷5=93÷3=28÷2=44÷2=84÷7=720÷9=500÷5=56÷4=320÷8=72÷6=48÷3=20022141212403180121410016【选自教材第99页第9题】66322666066÷364÷361÷33.=22=21……1=20……16432164316132061三位数除以一位数，从被除数的最高位起，一位一位地往下除，如果最高位不够除，就用它的首两位去除；除到哪一位，就把商写在那一位的上面；求出商的最高位数后，如果哪一位上不够商1，就在这一位商0；每次除得的余数都要比除数小。【选自教材第99页第10题】8484212844880848÷4548÷4148÷43.=212=137=37548413741412282801484371228280【选自教材第99页第10题】642÷9642÷8642÷6=71……3=80……2=10764297163129364288064264261076424203.【选自教材第99页第10题】4.计算下面各题，并验算。92÷3=923392030×390+292验算：30……2【选自教材第99页第11题】412÷8=41285401128451×8408+4412验算：51……4249÷7=249732135935435×7245+4249验算：35……4807÷4=80742807431201×4804+3807验算：201……35.97÷4=24（串）······1（个）答：最多能串24串。【选自教材第100页第13题】6.植物小组培育了60盆花，放在礼堂24盆，剩下的平均放在3个会议室里。每个会议室里放多少盆？（60-24）÷3=12（盆）答：每个会议室放12盆。【选自教材第100页第14题】通过这节课的学习活动，你有什么收获？课堂小结一两、三位数乘一位数··························································1二

千克和克·········································································28三长方形和正方形································································36周长是多少······································································46四两、三位数除以一位数·······················································48五解决问题的策略································································71间隔排列·········································································78六平移、旋转和轴对称··························································80七分数的初步认识（一）·······················································87多彩的“分数条”·····························································96八期末复习·········································································98苏教版三年级上册长方形和正方形平移、旋转和轴对称长方形和正方形长方形和正方形的特征（边和角）周长的含义平面图形的周长长方形的周长正方形的周长系统梳理【单击文字跳转链接】平移、旋转和轴对称平移（朝某一个方向）旋转(绕某一个点)轴对称图形【单击文字跳转链接】整理复习1长方形和正方形的特征【点击返回】长方形正方形相同点边角不同点都有4条边都有4个角，且都是直角对边相等四条边都相等物体某个面一周边线的长度，称为这个面的周长。2周长的含义【点击返回】3平面图形的周长长方形正方形（长+宽）×2边长×4周长C=2abC=4a【点击返回】4平移物体沿着直线方向运动。

物体的的形状、大小和本身的方向都不改变，只是位置发生了变化。平移【点击返回】5旋转物体围绕着一个点或一个轴转动。旋转物体的的形状、大小都不改变，只是本身的方向和位置发生了变化，这就是旋转的特征。【点击返回】沿一条直线对折后折痕两边能够完全重合的图形。6轴对称图形【点击返回】随堂练习1.先量一量，再计算每个图形的周长。1cm2cm2cm2+1+1=5（cm）1cm2cm2cm3cm2+2+3+1=8（cm）1cm1×6=6（cm）【选自教材第100页第15题】2.一块长方形菜地，长20米，宽8米。如果要给这块菜地围上篱笆，篱笆的长是多少米？（20+8）×2=56（米）答：篱笆的长是56米。【选自教材第100页第16题】3.是平移的画“√”，是旋转的画“○”。√√○○【选自教材第100页第17题】2.下面的消防安全标识，哪些可以看作轴对称图形？√√√√【选自教材第100页第18题】通过这节课的学习活动，你有什么收获？课堂小结一两、三位数乘一位数··························································1二

千克和克·········································································28三长方形和正方形································································36周长是多少······································································46四两、三位数除以一位数·······················································48五解决问题的策略································································71间隔排列·········································································78六平移、旋转和轴对称··························································80七分数的初步认识（一）·······················································87多彩的“分数条”·····························································96八期末复习·········································································98苏教版三年级上册千克和克分数的初步认识（一）整理复习1千克和克称一般物品有多重，常用千克作单位。千克可以用字母“kg”表示。称比较轻的物品，常用克作单位。克可以用字母“g”表示。1千克＝1000克（质量单位）2分数的初步认识（一）读作：四分之三分数线分子分母其中的几份平均分的份数平均分比较分数大小的方法是：分子是1的分数，分母越小，表示分的份数越少，其中的1份越大。

分子相同，分母小的分数大。分成同样多的份数，取的份数越多就越大。分母相同，分子大的分数越大。分数的简单计算：同分母分数相加减，分母不变，只把分子相加减。

1可以看作是分子分母相同的分数。1与分数相减：1.在（）里填合适的单位。（1）一袋大米重25（）。（2）一袋水果大约重3（）。（3）一盒饼干重500（）。（4）一筐土豆重18（）。千克千克克千克随堂练习【选自教材第101页第19题】2.3千克=（）克9000克=（）千克8千克=（）克2000克=（）千克3000980002【选自教材第101页第20题】3.2个橘子90克，一个橘子45克。50+20+20=90（g）90÷2=45（g）【选自教材第101页第21题】4.用分数表示涂色部分，并说说每个分数的含义。

把圆平均分成4份，涂色部分占其中1份把三角形平均分成3份，涂色部分占其中2份把长方形平均分成5份，涂色部分占其中2份【选自教材第101页第22题】5.把一张长方形纸对折、再对折……数一数每次对折后平均分成的份数，填在下表里，并说说每份各占这张纸的几分之几。

【选自教材第101页第23题】48416532664对折次数每次增加1次，平均分成的份数就等于原来的2倍。6.一块布的

做上衣，做裤子。你会用不同的颜色在下面的大长方形中表示做上衣的布和做裤子的布吗？

上衣裤子【选自教材第101页第24题】（1）做上衣和裤子一共用了这块布的几分之几？

（2）做上衣比做裤子多用了这块布的几分之几？

上衣裤子通过这节课的学习活动，你有什么收获？课堂小结一两、三位数乘一位数··························································1二

千克和克·········································································28三长方形和正方形································································36周长是多少······································································46四两、三位数除以一位数·······················································48五解决问题的策略································································71间隔排列·········································································78六平移、旋转和轴对称··························································80七分数的初步认识（一）·······················································87多彩的“分数条”·····························································96八期末复习·········································································98苏教版三年级上册解决问题的策略明确题意整理条件选择策略