苏教版三年级（上册）数学乘法和有关的实际问题期末复习教学课件

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