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1、学习好资料欢迎下载初一数学教案人教版人教版初一上数学教案(全册)导读：就爱阅读网友为您分享以下“人教版初一上数学教案(全册)”的资讯，希望对您有所帮助，感谢您对的支持!（1）8 十（一 5）十（一 4）；（2）8 十（一 5）十（一 4）；（3）（一 7）十（一 10）十（一 11）；（4）（一 7）十（一10）十（一 11）；（5）（一 22）十（一 27）十（十 27）；（6）（一 22）十（一27）十（十 27）；学习好资料欢迎下载师生：先让学生在小组内练习、讲座、交流，教师可积极参与其中，发现学生的问题。1.有理数加法法则（略），注意分类及符号的确定。2.进行有理数加法运算，首先要根据
2、具体情况正确地选用法则，确定和的符号，这与小学里学过的数的加法是不同的；而计算“和”的绝对值，用的是小学里的加法与减法的运算。3.解：（可由三位学生板演，然后一起纠正错误）（略）讲授新课（师生共同研究形成有理数运算律）：活动 2 1.通过以上练习，我们以前学过的加法交换律、结合律，在有理数的加法中它们还适用吗？计算：30 十（一 20），（一 20）文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文
3、档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V
4、6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8
5、E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B
6、5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H
7、6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2
8、A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A
9、5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5学习好资料欢迎下载十 30.两次所得和相同吗？换几个数再试一试。计算：8 十（一 2）十（十 2），8 十（一 2）十（十2）.两次所得和相同吗？换几个数再试一试。2.尝试用文字语言或字母表示有理数加法的交换律和结合律。师生：分小组多尝试几组有理数加法运算，师生共同讨论得出：（1）交换律：在有理数加法中，两个数相加，交换加数的位置，和不变。即：a?b?b?a（2）结合律：在有理数加法中，三个数相加，先把前两个数相加，或 者 先 把 后 两 个 数 相 加，和 不 变。即：(a?b)?c?a?(b?c).文档
10、编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6
11、G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E
12、2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5
13、文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6
14、V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A
15、8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5
16、B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5学习好资料欢迎下载师：对于加法交换律和结合律，既要注意文字表述，也要注意字母的表示。板书 1.式子中的字母，分别表示任意的一个有理数，也就是说它们可以表示整数，也可以表示分数，特别是既可以表示正数，也可以表示负数或0.例如2.也要注意：在同一个式子中，同一个字母只表示
17、同一个数。巩固提高-运用举例，练习活动 3 教科书第 24 页：例 3计算：16 十（一 25）十 24 十（一 35）。文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H
18、6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:C
19、J10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 H
20、G5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV
21、8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码
22、:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1
23、 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5学习好资料欢迎下载师：怎样可以使计算简化呢？这样做的根据是什么？生：把正数与负数分别相加。这样做既用到了加法的交换律，又运用了加法结合律。例
24、4每袋小麦的标准重量为90 千克，10 袋小麦称重记录如下：（单位：千克）91，91，91.5，89，91.2，91.3，88.7，88.8，91.8，91.1.与标准重量相比较，10 袋小麦总计超过多少千克或不足多少千克？10 袋小麦的总重量是多少？解法 1：先计算 10 袋小麦的总重量：91 十 91 十 91.5 十 89 十 91.2 十 91.3 十 88.7 十 88.8 十 91.8十 91.1=905.4（千克）再计算总计超过905.4 一 90310=5.4（千克）解法 2：每袋小麦超过标准重量的千克数记作正数，不足的千克数记作负数。10 袋小麦对应的数为：文档编码:CJ10
25、Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I
26、7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6
27、T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ
28、10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG
29、5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8
30、H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:
31、CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5学习好资料欢迎下载十 1，十 1，十 1.5，一 1，十 1.2，十 1.3，一 1.3，一 1.2，十 1.8，十 1.1.这 10 个数的和为：1 十 1 十 1.5 十（一 1）十 1.2 十 1.3 十（一 1.3）十（一 1.2）十 1.8 十 1.1.=1 十（一 1）
32、十1.2 十（一 1.2）十1.3 十（一 1.3）十（1 十 1.5 十十 1.8 十 1.1）=5.4 905.4 一 90310=5.4（千克）答：10 袋小麦总计超过标准重量5.4 千克，总重量是905.4千克。师：比较两种解法，解法2 中使用了哪些运算律？生：例 4 的解法 2 说明：把互为相反数的数结合起来相加，文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V
33、6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8
34、E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B
35、5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H
36、6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2
37、A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A
38、5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q
39、8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5学习好资料欢迎下载可以使计算简化。这种方法使用了加法交换律和加法结合律。师：很好！我们运用运算律就是为了使运算简便。由例3和例 4 我们可以发现：我们使用加法交换律和加法结合律，目的是为了把正数、负数、互为相反数分别结合在一起，这样做一般情况下会比较简便。我们做下组练习，相信同学们会很棒！活动 4 练习：课本P25 练习（由学生板演）（1）计算：23 十（一 17）十 6 十（一 22）;（一 2）十 3 十 1 十（一 3）十 2 十（一 4）。（2）计算：1 十(?)?(?);13323(?2)?5?(?8).454512131
40、6 文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8
41、H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H
42、2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9
43、A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10
44、Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I
45、7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6
46、T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5学习好资料欢迎下载师生：教师巡视、指导；学生完成、交流；师生评价。课时小结：这节课我们学习了哪些知识？你能说一说吗？课后作业：课本习题1.3 的第 2 题。活动与探究：填幻方有人建议向火星发射如下图的图案，它叫做幻方，其中9 个格1.1.1 正数和负数教学目的
47、：（一）知识点目标：1.了解正数和负数是怎样产生的。文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E
48、2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5
49、文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6
50、V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A8E2 ZV8H6T9A5B5文档编码:CJ10Q8H6V6G1 HG5I7H2A