2022年二年级数学下册单元知识点整理归纳2 .pdf
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1、。1 二年级数学下册单元知识点整理与归纳第一单元数据收集整理1、用画“正”字的方法收集数据。2、用统计图表来表示数据的情况。3、根据统计图表可以做出一些判断,回答问题。4、数据收集-整理-分析表格。第二单元表内除法(一)一、把一些物品分成几份,每份分得同样多,叫平均分。二、除法1、除法算式的含义:只要是平均分的过程,就可以用除法算式表示。2、除法算式各部分的名称:在除法算式中,除号前面的数就被除数,除号后面的数叫除数,所得的数叫商。例:12 4=3 读作:12 除以 4 等于 3 叫做除号,12是被除数,4 是除数,商是 3.1、求商的方法:用乘法口诀求商。2、用乘法口诀求商时,想除数和几相乘
2、的被除数。2 三、解决问题用乘法和除法两步计算解决实际问题的方法:(1)所求问题要求求出总数,用乘法计算;(2)所求问题要求求出份数或每份数,用除法计算。第三单元图形的运动1、认识轴对称图形:一个图形,通过对折来判断图形是否为轴对称图形。对折后能够完全重合(左右,上下两部分形状和大小都完全相同),就是轴对称图形,这条折痕叫对称轴。2、认识平移:沿着直的路线移动(上、下,左、右,斜着),在移动中没有改变大小和方向,只是位置发生了变化。常见的平移现象有:电梯、开窗户、开抽屉等。3、认识旋转:物体的每个部分都围绕同一个点(或同一条直线)转动。常见的选择现象有:电风扇、手表、直升飞机等。文档编码:CW
3、10T1J9T8T10 HY3E1U1D5H3 ZI3F7F6S6G6文档编码:CW10T1J9T8T10 HY3E1U1D5H3 ZI3F7F6S6G6文档编码:CW10T1J9T8T10 HY3E1U1D5H3 ZI3F7F6S6G6文档编码:CW10T1J9T8T10 HY3E1U1D5H3 ZI3F7F6S6G6文档编码:CW10T1J9T8T10 HY3E1U1D5H3 ZI3F7F6S6G6文档编码:CW10T1J9T8T10 HY3E1U1D5H3 ZI3F7F6S6G6文档编码:CW10T1J9T8T10 HY3E1U1D5H3 ZI3F7F6S6G6文档编码:CW10T1J9
4、T8T10 HY3E1U1D5H3 ZI3F7F6S6G6文档编码:CW10T1J9T8T10 HY3E1U1D5H3 ZI3F7F6S6G6文档编码:CW10T1J9T8T10 HY3E1U1D5H3 ZI3F7F6S6G6文档编码:CW10T1J9T8T10 HY3E1U1D5H3 ZI3F7F6S6G6文档编码:CW10T1J9T8T10 HY3E1U1D5H3 ZI3F7F6S6G6文档编码:CW10T1J9T8T10 HY3E1U1D5H3 ZI3F7F6S6G6文档编码:CW10T1J9T8T10 HY3E1U1D5H3 ZI3F7F6S6G6文档编码:CW10T1J9T8T10
5、HY3E1U1D5H3 ZI3F7F6S6G6文档编码:CW10T1J9T8T10 HY3E1U1D5H3 ZI3F7F6S6G6文档编码:CW10T1J9T8T10 HY3E1U1D5H3 ZI3F7F6S6G6文档编码:CW10T1J9T8T10 HY3E1U1D5H3 ZI3F7F6S6G6文档编码:CW10T1J9T8T10 HY3E1U1D5H3 ZI3F7F6S6G6文档编码:CW10T1J9T8T10 HY3E1U1D5H3 ZI3F7F6S6G6文档编码:CW10T1J9T8T10 HY3E1U1D5H3 ZI3F7F6S6G6文档编码:CW10T1J9T8T10 HY3E1U
6、1D5H3 ZI3F7F6S6G6文档编码:CW10T1J9T8T10 HY3E1U1D5H3 ZI3F7F6S6G6文档编码:CW10T1J9T8T10 HY3E1U1D5H3 ZI3F7F6S6G6文档编码:CW10T1J9T8T10 HY3E1U1D5H3 ZI3F7F6S6G6文档编码:CW10T1J9T8T10 HY3E1U1D5H3 ZI3F7F6S6G6文档编码:CW10T1J9T8T10 HY3E1U1D5H3 ZI3F7F6S6G6文档编码:CW10T1J9T8T10 HY3E1U1D5H3 ZI3F7F6S6G6文档编码:CW10T1J9T8T10 HY3E1U1D5H3
7、ZI3F7F6S6G6文档编码:CW10T1J9T8T10 HY3E1U1D5H3 ZI3F7F6S6G6文档编码:CW10T1J9T8T10 HY3E1U1D5H3 ZI3F7F6S6G6文档编码:CW10T1J9T8T10 HY3E1U1D5H3 ZI3F7F6S6G6文档编码:CW10T1J9T8T10 HY3E1U1D5H3 ZI3F7F6S6G6文档编码:CW10T1J9T8T10 HY3E1U1D5H3 ZI3F7F6S6G6文档编码:CW10T1J9T8T10 HY3E1U1D5H3 ZI3F7F6S6G6文档编码:CW10T1J9T8T10 HY3E1U1D5H3 ZI3F7F
8、6S6G6文档编码:CW10T1J9T8T10 HY3E1U1D5H3 ZI3F7F6S6G6文档编码:CW10T1J9T8T10 HY3E1U1D5H3 ZI3F7F6S6G6文档编码:CW10T1J9T8T10 HY3E1U1D5H3 ZI3F7F6S6G6文档编码:CW10T1J9T8T10 HY3E1U1D5H3 ZI3F7F6S6G6文档编码:CW10T1J9T8T10 HY3E1U1D5H3 ZI3F7F6S6G6文档编码:CW10T1J9T8T10 HY3E1U1D5H3 ZI3F7F6S6G6文档编码:CW10T1J9T8T10 HY3E1U1D5H3 ZI3F7F6S6G6文
9、档编码:CW10T1J9T8T10 HY3E1U1D5H3 ZI3F7F6S6G6文档编码:CW10T1J9T8T10 HY3E1U1D5H3 ZI3F7F6S6G6文档编码:CW10T1J9T8T10 HY3E1U1D5H3 ZI3F7F6S6G6文档编码:CW10T1J9T8T10 HY3E1U1D5H3 ZI3F7F6S6G6文档编码:CW10T1J9T8T10 HY3E1U1D5H3 ZI3F7F6S6G6。3 第四单元表内除法(二)一、用 7、8、9 的乘法口诀求商求商方法:想“除数()=被除数”,再根据乘法口诀计算得商。二、解决问题求一个数里有几个几,和把一个数平均分成几份,求每份
10、是多少,都用除法计算。第五单元混合运算1、在没有括号的算式里,只有加、减法或只有乘、除法,都要从左往右按顺序计算。2、如果有乘、除法,又有加、减法,要先算乘、除法,后算加、减法。3、算式里有括号的,要先算括号里面的。二、解决两步计算的实际问题1、想好先解决什么问题,再解决什么问题。2、可以画图帮助分析。3、可以分步列式计算,也可以列综合算式。第六单元有余数的除法一、有余数的除法1、有余数的除法的意义:在平均分一些物体时,有时会有剩余。文档编码:CW10T1J9T8T10 HY3E1U1D5H3 ZI3F7F6S6G6文档编码:CW10T1J9T8T10 HY3E1U1D5H3 ZI3F7F6S
11、6G6文档编码:CW10T1J9T8T10 HY3E1U1D5H3 ZI3F7F6S6G6文档编码:CW10T1J9T8T10 HY3E1U1D5H3 ZI3F7F6S6G6文档编码:CW10T1J9T8T10 HY3E1U1D5H3 ZI3F7F6S6G6文档编码:CW10T1J9T8T10 HY3E1U1D5H3 ZI3F7F6S6G6文档编码:CW10T1J9T8T10 HY3E1U1D5H3 ZI3F7F6S6G6文档编码:CW10T1J9T8T10 HY3E1U1D5H3 ZI3F7F6S6G6文档编码:CW10T1J9T8T10 HY3E1U1D5H3 ZI3F7F6S6G6文档编
12、码:CW10T1J9T8T10 HY3E1U1D5H3 ZI3F7F6S6G6文档编码:CW10T1J9T8T10 HY3E1U1D5H3 ZI3F7F6S6G6文档编码:CW10T1J9T8T10 HY3E1U1D5H3 ZI3F7F6S6G6文档编码:CW10T1J9T8T10 HY3E1U1D5H3 ZI3F7F6S6G6文档编码:CW10T1J9T8T10 HY3E1U1D5H3 ZI3F7F6S6G6文档编码:CW10T1J9T8T10 HY3E1U1D5H3 ZI3F7F6S6G6文档编码:CW10T1J9T8T10 HY3E1U1D5H3 ZI3F7F6S6G6文档编码:CW10
13、T1J9T8T10 HY3E1U1D5H3 ZI3F7F6S6G6文档编码:CW10T1J9T8T10 HY3E1U1D5H3 ZI3F7F6S6G6文档编码:CW10T1J9T8T10 HY3E1U1D5H3 ZI3F7F6S6G6文档编码:CW10T1J9T8T10 HY3E1U1D5H3 ZI3F7F6S6G6文档编码:CW10T1J9T8T10 HY3E1U1D5H3 ZI3F7F6S6G6文档编码:CW10T1J9T8T10 HY3E1U1D5H3 ZI3F7F6S6G6文档编码:CW10T1J9T8T10 HY3E1U1D5H3 ZI3F7F6S6G6文档编码:CW10T1J9T8
14、T10 HY3E1U1D5H3 ZI3F7F6S6G6文档编码:CW10T1J9T8T10 HY3E1U1D5H3 ZI3F7F6S6G6文档编码:CW10T1J9T8T10 HY3E1U1D5H3 ZI3F7F6S6G6文档编码:CW10T1J9T8T10 HY3E1U1D5H3 ZI3F7F6S6G6文档编码:CW10T1J9T8T10 HY3E1U1D5H3 ZI3F7F6S6G6文档编码:CW10T1J9T8T10 HY3E1U1D5H3 ZI3F7F6S6G6文档编码:CW10T1J9T8T10 HY3E1U1D5H3 ZI3F7F6S6G6文档编码:CW10T1J9T8T10 HY
15、3E1U1D5H3 ZI3F7F6S6G6文档编码:CW10T1J9T8T10 HY3E1U1D5H3 ZI3F7F6S6G6文档编码:CW10T1J9T8T10 HY3E1U1D5H3 ZI3F7F6S6G6文档编码:CW10T1J9T8T10 HY3E1U1D5H3 ZI3F7F6S6G6文档编码:CW10T1J9T8T10 HY3E1U1D5H3 ZI3F7F6S6G6文档编码:CW10T1J9T8T10 HY3E1U1D5H3 ZI3F7F6S6G6文档编码:CW10T1J9T8T10 HY3E1U1D5H3 ZI3F7F6S6G6文档编码:CW10T1J9T8T10 HY3E1U1D
16、5H3 ZI3F7F6S6G6文档编码:CW10T1J9T8T10 HY3E1U1D5H3 ZI3F7F6S6G6文档编码:CW10T1J9T8T10 HY3E1U1D5H3 ZI3F7F6S6G6文档编码:CW10T1J9T8T10 HY3E1U1D5H3 ZI3F7F6S6G6文档编码:CW10T1J9T8T10 HY3E1U1D5H3 ZI3F7F6S6G6文档编码:CW10T1J9T8T10 HY3E1U1D5H3 ZI3F7F6S6G6文档编码:CW10T1J9T8T10 HY3E1U1D5H3 ZI3F7F6S6G6文档编码:CW10T1J9T8T10 HY3E1U1D5H3 ZI
17、3F7F6S6G6文档编码:CW10T1J9T8T10 HY3E1U1D5H3 ZI3F7F6S6G6文档编码:CW10T1J9T8T10 HY3E1U1D5H3 ZI3F7F6S6G6文档编码:CW10T1J9T8T10 HY3E1U1D5H3 ZI3F7F6S6G6。4 2、余数与除数的关系:在有余数的除法中,余数都比除数小。例:168=2 余数可能是(1、2、3、4、5、6、7)最大的余数是7,最小的余数是1.3、列竖式计算除法时,要注意:相同数位要对齐。4、有余数的除法的计算方法:商:即试商,想除数和几相乘最接近被除数且小于被除数,那么商就是几,写在被除数的个位的上面。第七单元万以内数
18、的认识1、10 个一是十,十个十是一百,10 个一百是一千,10 个一千是一万。2、一千里面有10 个一百,一千里面有100个十。3、一万里面有10 个一千,一万里面有100个一百。4、在算盘里,一个上珠表示5,一个下珠表示 1。5、读数时,要从高位读起。千位上是几就读几千,百位上是几就读几百,十位上几就读几十,个位上是几就读几。中间有一个0文档编码:CW10T1J9T8T10 HY3E1U1D5H3 ZI3F7F6S6G6文档编码:CW10T1J9T8T10 HY3E1U1D5H3 ZI3F7F6S6G6文档编码:CW10T1J9T8T10 HY3E1U1D5H3 ZI3F7F6S6G6文档
19、编码:CW10T1J9T8T10 HY3E1U1D5H3 ZI3F7F6S6G6文档编码:CW10T1J9T8T10 HY3E1U1D5H3 ZI3F7F6S6G6文档编码:CW10T1J9T8T10 HY3E1U1D5H3 ZI3F7F6S6G6文档编码:CW10T1J9T8T10 HY3E1U1D5H3 ZI3F7F6S6G6文档编码:CW10T1J9T8T10 HY3E1U1D5H3 ZI3F7F6S6G6文档编码:CW10T1J9T8T10 HY3E1U1D5H3 ZI3F7F6S6G6文档编码:CW10T1J9T8T10 HY3E1U1D5H3 ZI3F7F6S6G6文档编码:CW1
20、0T1J9T8T10 HY3E1U1D5H3 ZI3F7F6S6G6文档编码:CW10T1J9T8T10 HY3E1U1D5H3 ZI3F7F6S6G6文档编码:CW10T1J9T8T10 HY3E1U1D5H3 ZI3F7F6S6G6文档编码:CW10T1J9T8T10 HY3E1U1D5H3 ZI3F7F6S6G6文档编码:CW10T1J9T8T10 HY3E1U1D5H3 ZI3F7F6S6G6文档编码:CW10T1J9T8T10 HY3E1U1D5H3 ZI3F7F6S6G6文档编码:CW10T1J9T8T10 HY3E1U1D5H3 ZI3F7F6S6G6文档编码:CW10T1J9T
21、8T10 HY3E1U1D5H3 ZI3F7F6S6G6文档编码:CW10T1J9T8T10 HY3E1U1D5H3 ZI3F7F6S6G6文档编码:CW10T1J9T8T10 HY3E1U1D5H3 ZI3F7F6S6G6文档编码:CW10T1J9T8T10 HY3E1U1D5H3 ZI3F7F6S6G6文档编码:CW10T1J9T8T10 HY3E1U1D5H3 ZI3F7F6S6G6文档编码:CW10T1J9T8T10 HY3E1U1D5H3 ZI3F7F6S6G6文档编码:CW10T1J9T8T10 HY3E1U1D5H3 ZI3F7F6S6G6文档编码:CW10T1J9T8T10 H
22、Y3E1U1D5H3 ZI3F7F6S6G6文档编码:CW10T1J9T8T10 HY3E1U1D5H3 ZI3F7F6S6G6文档编码:CW10T1J9T8T10 HY3E1U1D5H3 ZI3F7F6S6G6文档编码:CW10T1J9T8T10 HY3E1U1D5H3 ZI3F7F6S6G6文档编码:CW10T1J9T8T10 HY3E1U1D5H3 ZI3F7F6S6G6文档编码:CW10T1J9T8T10 HY3E1U1D5H3 ZI3F7F6S6G6文档编码:CW10T1J9T8T10 HY3E1U1D5H3 ZI3F7F6S6G6文档编码:CW10T1J9T8T10 HY3E1U1
23、D5H3 ZI3F7F6S6G6文档编码:CW10T1J9T8T10 HY3E1U1D5H3 ZI3F7F6S6G6文档编码:CW10T1J9T8T10 HY3E1U1D5H3 ZI3F7F6S6G6文档编码:CW10T1J9T8T10 HY3E1U1D5H3 ZI3F7F6S6G6文档编码:CW10T1J9T8T10 HY3E1U1D5H3 ZI3F7F6S6G6文档编码:CW10T1J9T8T10 HY3E1U1D5H3 ZI3F7F6S6G6文档编码:CW10T1J9T8T10 HY3E1U1D5H3 ZI3F7F6S6G6文档编码:CW10T1J9T8T10 HY3E1U1D5H3 Z
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