苏教版三年级（上册）数学长方形和正方形平移、旋转和轴对称期末复习教学课件

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