2022年二年级数学上册知识点 .pdf

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1、学习必备欢迎下载二年级上数学各单元知识点归纳复习第一单元：长度单位知识要点归纳:1、常用的长度单位：米、厘米。2、测量较短物体通常用厘米作单位，测量较长物体通常用米作单位。3、测量物体长度的方法：将物体的左端对准直尺的“0”刻度，看物体的右端对着直尺上的刻度是几，这个物体的长度就是几厘米。4、米和厘米的关系：1 米=100 厘米 100厘米=1米5、线段：线段的特点：线段是直的;线段有两个端点；线段有长有短，是可以量出长度的。画线段的方法：先用笔对准尺子的0”刻度，在它的上面点一个点，再对准要画到的长度的厘米刻度，在它的上面也点一个点，然后把这两个点连起来。测量物体的长度时，当不是从“0”刻度

2、量起时，要用终点的刻度数减去起点的刻度数。6、填上合适的长度单位。（巩固练习）（1）小明身高 1（米）30（厘米）（2）练习本宽 13（厘米）（3）铅笔长 17（厘米）（4）黑板长 2（米）（5）图钉长 1（厘米）（6）一张床长 2（米）（7）一口井深 3（米）（8）教学楼高 25（米）（9）学校进行 100（米）赛跑（10）跳绳长 2（米）（11）宝宝身高 80（厘米）（12）一棵树高 3（米）学习必备欢迎下载（13）一把钥匙长 5（厘米）（14）门高 2（米）（15）一个文具盒长 24（厘米）（16）讲台高 90（厘米）（17）教室长 12（米）（18）筷子长 20（厘米）第二单元 100

3、 以内数的加法和减法知识要点归纳:一、两位数加两位数1、两位数加两位数不进位加法的计算法则：把相同数位对齐列竖式，再把相同数位上的数相加。2、两位数加两位数进位加法的计算法则：相同数位对齐；从个位加起；个位满十向十位进1。3、笔算两位数加两位数时，相同数位要对齐，从个位加起，个位满十要向十位进“1”，十位上的数相加时，不要遗漏进上来的“1”。4、和=加数 加数一个加数 =和 另一个加数二、两位数减两位数 1、两位数减两位数不退位减的笔算：相同数位对齐列竖式，再把相同数位上的数相减。2、两位数减两位数退位减的笔算法则：相同数位对齐；从个位减起；个位不够减，从十位退1，在个位上加 10 再减。3、

4、笔算两位数减两位数时，相同数位要对齐，从个位减起，个位不够减，从十位退 1，个位加 10 再减，十位计算时要先减去退走的1 再算。4、差=被减数减数被减数=减数+差减数=被减数差文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:C

5、X5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI

6、9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB

7、5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码

8、:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5

9、HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3

10、ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2学习必备欢迎下载三、连加、连减和加减混合1、连加、连减：连加、连减的笔算顺序和连加、连

11、减的口算顺序一样，都是从左往右依次计算。连加计算可以分步计算，也可以写成一个竖式计算，计算方法与两个数相加一样，都要把相同数位对齐，从个位加起。连减运算可以分步计算，也可以写成一个竖式计算，计算方法与两个数相减一样，都要把相同数位对齐，从个位减起。2、加减混合加、减混合算式，其运算顺序、竖式写法都与连加、连减相同。3、加减混合运算写竖式时可以分步计算，方法与两个数相加（减）一样，要把相同数位对齐，从个位算起；也可以用简便的写法，列成一个竖式，先完成第一步计算，再用第一步的结果加（减）第二个数。四、解决问题（应用题）1、步骤：先读题列横式，写结果，千万别忘记写单位（单位为：多少或者几后面的那个字

12、或词）作答。2、求比一个数多几的数的应用题用加法；求比一个数少几的数的应用题用减法计算（注意：用大的数减小的数）。3、关于提问题的题目，可以这样提问：.和 一共.？比.多多少（几）？比.少多少（几）？文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F

13、1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5

14、U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q

15、6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z

16、7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:C

17、X5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI

18、9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2学习必备欢迎下载第三单元角的初步认识知识要点归纳：1、角：像红领

19、巾、三角板、钟面、等实物上都有大大小小不同的角。2、角各部分的名称：一个角有一个顶点，两条边。3、角的特点：一个顶点，两条边（两边是直的）；它的两条边是射线不是线段；射线就是只有一个端点，不能测量出长度。4、用直尺画角的方法：画角时先确定一个点，用直尺向不同的方向画两条线，就画成一个角。5、角的大小与两条边的长短无关，只和两条边张开的宽度有关。6、角的两边张得越大，角就越大。7、画直角的方法：画一个点从这点起画一条直线把三角板的一条直角边与所画的直线重合，直角顶点与所画的点重合沿三角板另一条直角边画一条直线画完直角要标上直角符号8、要知道一个角是不是直角，可以用三角板上的直角比一比：顶点对顶点

20、，一边对一边，再看另一边。9、三角板上的 3 个角中，有 1 个是直角。正方形、长方形都有4 个角，都是直角。文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L

21、2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9

22、P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z

23、10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E

24、5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2

25、M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N

26、1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2学习必备欢迎下载第四单元表内乘法（一）与第六单元表内乘法（二）知识要点归纳：1、乘法的含义乘法是求几个相同加数和的简便算法。如：计算：2+2+2=6，用乘

27、法算就是：23=6 或 32=6.2、乘法算式的写法和读法连加算式改写为乘法算式的方法：求几个相同加数的和，可以用乘法计算。写乘法算式时，可以先写相同的加数，然后写乘号，再写相同加数的个数，最后写等号与连加的和；也可以先写相同加数的个数，然后写乘号，再写相同加数，最后写等号与连加的和。如：4+4+4=12改写成乘法算式是43=12 或 34=12 乘法算式的读法。读乘法算式时，要按照算式顺序来读。如：63=18读作：“6 乘 3 等于 18”。3、乘法算式中各部分的名称及实际表示的意义在乘法算式里，乘号前面的数和乘号后面的数都叫做“乘数”；等号后面的得数叫做“积”。4、乘法算式所表示的意义求几

28、个相同加数的和，用乘法计算比较简单。一道乘法算式表示的就是几个相同加数连加的和。如：45 表示 5 个 4 相加或 4 个 5 相加。5、加法写成乘法时，加法的和与乘法的积相同。6、乘法算式中，两个乘数交换位置，积不变。文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z1

29、0H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5

30、L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M

31、9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1

32、Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1

33、E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U

34、2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2学习必备欢迎下载7、算式各部分名称及计算公式

35、。（1）乘法：乘数乘数=积（2）加法：加数+加数=和和加数=加数（3）减法：被减数减数=差被减数=差+减数减数=被减数差8、在 9 的乘法口诀里，几乘9 或 9 乘几，都可看作几十减几，其中“几”是指相同的数。如：19=101 95=505 9、看图，写乘加、乘减算式时：（1）乘加：先把相同的部分用乘法表示，再加上不相同的部分。（2）乘减：先把每一份都算成相同的，写成乘法，然后再把多算进去的减去。（3）计算时，先算乘，再算加减。加法：3+3+3+3+2=14 乘加：34+2=14 乘减：35-1=14 10、“求一个数的几倍是多少”用乘法计算。用：这个数倍数或倍数这个数。11、有几个相同加数，

36、就是这个相同加数的几倍。如：3 个 5，就是 5 的 3倍。第五单元观察物体知识要点归纳：文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U

37、2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6

38、N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7

39、F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX

40、5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9

41、Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5

42、Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2学习必备欢迎下载1、知道从不同位置观察到的物体的形状可能是不同的。2、辨认从不同位置看到的简单物体的形状。3、辨认从不同位置看到的简单几何体的形状。4、用推理解决简单的问题。

43、第七单元认识时间知识要点归纳：1、在具体的生活情境中，借助钟面认识时间单位“分”，知道 1 时等于 60分。2、结合直观演示和操作，知道钟面上分针走一“小格”是1 分钟，分针走一“大格”是 5 分钟，分针走一圈是60 分钟。3、初步认识几时几分（5 分 5 分地数）会读写几时几分和几时半。4、会运用时间的有关知识解决一些简单的实际问题。第八单元数学广角知识要点归纳：1、在排列和组合中，要按一定的顺序进行，才不会选重或选漏。2、数字的组合；衣服的搭配；握手；怎样付钱；推理、猜测。文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 H

44、I9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 Z

45、B5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编

46、码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5

47、 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3

48、 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文

49、档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2文档编码:CX5U2M9P4G5 HI9Q6N1Z10H3 ZB5Z7F1E5L2