最新你有几辆车(六篇)
无论是身处学校还是步入社会,大家都尝试过写作吧,借助写作也可以提高我们的语言组织能力。相信许多人会觉得范文很难写?以下是我为大家搜集的优质范文,仅供参考,一起来看看吧
你有几辆车篇一
义务教育课程标准实验教科书(北师大版)一年级上册第23——24页。
通过解决有几辆车这一问题,初步感知从不同的观察角度出发,会列出不同的算式,初步体会“加法交换律”的含义
过程与方法:通过解决这一数学问题,初步感知从不同角度出发。
培养学生认真细致的观察能力和推理、概括能力
从不同的观察角度出发,会列出不同的算式]
初步体会”加法交换律“的含义
教具准备:小汽车、挂图、皮卡丘、红花、卡片
一、创境准备
1、(出示淘气和笑笑图片)你们认识它吗?喜不喜欢他们?今天来到我们的课上和我们一起学习?
2、师:他们是一个认真观察、爱动脑筋的小精灵,它在上学的路,经过了一个停车场,发现了一个数学问题,就把这个数学问题带来与小朋友们一起分享,让我们赶快来看一看什么问题,淘气和笑笑是一年级学生非常喜爱的好朋友。课一开始就把它作为学习伙伴引入,激发学生的学习兴趣。)
二、探究发现(教师把讲台桌布置成停车场)
㈠、引导理解加法交换律的含义
1、师:通过观察你看到了什么?
生:停车场的左边有3辆车,右边有2辆车:或者右边有2辆车,左边有3辆车。
师:想提什么数学问题?
生:停车场一共有几辆车?
师:怎样列算式?
师指着算式中“3、2、5”各表示什么?
师:仔细观察这两个算式,你能发现什么?
生:都是等于5,不同的是交换了3和2位置
生:所以我们说3+2=2+3
2、请学生用学生代替小汽车摆一摆。
(从实际生活中的活动场面入手,让学生自己提出问题,解决问题,既提高了学生的提出问题的能力,又感受到数学与生活的联系,也较好地体现出学生学习的主体参与意识。)
二)、摆一摆
师:笑笑认真观察爱动脑筋,老师要奖给它小红花。(师在黑板上贴出3朵红花)。小朋友们也要向学习,你们能从这些红花中提数学问题吗?
1、指名回答后,让学生动手摆一摆,列出算式
师:小朋友们也表现得棒,老师也给小朋友们奖励红花。(师贴出3朵红花)
2、学生又根据教师贴的红花,说算式
(摆一摆的设计,教育了学生要做生活中的有心人,使学生进一步体例到数学就在我们身边,数学与 我们的生活密切联系)
(三)、试一试
⑴师引导生说图意
⑵小组合作完成
⑶全班交流
三、总结交流:通过你的学习,你在这节课中发现了什么?你能用自己的话说一说吗?
四、巩固练习
1、单项练习
⑴师:请小朋友们一起来拍手游戏。听清楚老师拍几下,然后你拍的和我拍的合起来要是
⑵如:师拍:×
生拍:××××
师:谁能根据我们拍的次数列成算式?
生:1+4=5 4+1=5
2、对比练习
教师把第25页中第2题的算式写在卡片上,师举卡片,生答
3、应用练习 师:今天淘气还给大家带来一些小精灵算式,你想上来摘哪道就摘哪道,拿到算式的学生进行比较,没拿到算式的同学做小裁判。(把第25页第3题写在卡片上)
4、请学生模拟表演第4题
5、引导学生理解图意后,独立列式计算全班交流
你有几辆车篇二
1、初步感知从不同的观察角度列出不同的算式。
2、进一步体会“加法交换律”的含义。
重点
体会和理解“加法交换律”的含义。
难点
理解“加法交换律”的含义。
教具
课件
电化教具
电脑
一、看一看:
(书p24)停车场里停了很多汽车,同学们看到汽车后谁能提出数学问题?你会怎样列式?然后在进行比较,发现规律。
3+2=5 2+3=5
3+2=2+3
二、摆一摆、试一试:
学生观察书中的图,鼓励他们根据图意提出问题。在解决问题时,教师可以引导学生列出两个不同的算式,并比较两个算式的异同,让学生直观的理解加法交换律的含义。
试一试,让学生独立完成,注意引导学生提出问题,并能清楚的表达图意。
三、练一练:
1、(书p24)让学生先动手摆一摆,再做练习。
2、让学生独立观察书中的图,理解图意,列式解决问题。学生可以列出不同的加法算式:2+3=5,3+2=5,1+4=5等,只要学生能说出合适的理由,教师都应该给与肯定。
教学过程
3、游戏:让10名学生排成一排,面向在座的学生,然后提问:**排第几个呀?(学生会有两种回答,让学生明确回答从哪面数的。)
4、出示小鸟的图片,让学生根据图片编故事,同桌之间相互合作,完成p25的第5题。
板 书 设 计
加 法
3+2=5 2+3=5
3+2= 2+3
教学
后记
少部分学生没有按照图的意思列出算式,应给予及时的纠正。
你有几辆车篇三
����
�������������ú½ì²äµï¿½24-25ò³ï¿½ï¿½ï¿½ï¿½òªï¿½ï¿½ï¿½ý£ï¿½ï¿½ï¿½ï¿½ï¿½ò»ï¿½ú¡ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ò»ï¿½ô¡ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ò»ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ó·ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½é¡ï¿½ï¿½ï¿½.���塣
����
����1��ê¹ñ§ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½öªï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ó£ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½î»ï¿½ã£ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ä¡±ï¿½ä¼ó·ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½é¡ï¿½
����2��ê¹ñ§ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ñ§ï¿½ï¿½ó²ï¿½í¬ï¿½ç¶è¹û²ï¿½ï¿½ï¿½ï¿½ï£¬ï¿½ï¿½í¸ï¿½ï¿½ö¤í³ò»ï¿½ï¿½ë¼ï¿½ï¿½ï¿½ï¿½î¡£
����3��í¨ï¿½ï¿½ï¿½é¾°ï¿½î¶¯ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ñ§ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½â¡¢ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ô±ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½
����4��í¨ï¿½ï¿½ï¿½ï¿½ï¿½ö²ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ñ§ï°ï¿½ï¿½ï¿½ï¿½ï¿½à½»ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ê½ê¹ñ§ï¿½ï¿½ï¿½ï¿½öªï¿½ï¿½ï¿½ó·ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½é¡ï¿½ï¿½ï¿½
����5����ñ§ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ó²ï¿½í¬ï¿½ç¶è¹û²ï¿½í¬ò»ï¿½ï¿½ï¿½ï¡¢ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½â¡¢ï¿½ï¿½ï¿½ö¹ï¿½ï¿½éµè¹ï¿½ï¿½ì£ï¿½ï¿½ï¿½ï¿½ï¿½ñ§ï¿½ï¿½ñ§ï°ï¿½ó·ï¿½ï¿½ï¿½ï¿½ï¿½è¤ï¿½ï¿½ï¿½ï¿½ï¿½ä¡ï¿½
����
����í¨ï¿½ï¿½ï¿½ï¿½ï¸ï¿½û²ì£¬ï¿½ï¿½ï¿½ö²ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ò»ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ó·ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½éµäºï¿½ï¿½å¡£
����
�������ý¾ï¿½ï¿½ï¿½ï¿½é¾°ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ð³ï¿½ï¿½ï¿½í¬ï¿½ä¼ó·ï¿½ï¿½ï¿½ê½ï¿½ï¿½
����
����1����24ò³ï¿½ï¿½ï¿½ï¿½í¼ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ò»ï¿½ô¡ï¿½í¼
����2������4�䡣
����ñ§ï¿½ï¿½
����ò»ï¿½ï¿½ï¿½ï¿½ï°
����1+2= 2+1= 1+3= 3+1= 2+3= 3+2=
����4+1= 1+4= 5+0= 0+5= 2+2=
�������������
����1���������루�ø´ï¿½ãµï¿½ð¡ï¿½ï¿½ï¿½ñ½ï¿½ï¿½ï¿½ð¡ï¿½ì»¨ï¿½ï¿½
������������ô½ï¿½ï¿½ô½ï¿½ï¿½ï¿½ë£ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ò²ô½ï¿½ï¿½ô½ï¿½ï¿½ï¿½ë¡ï¿½ï¿½â²»ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½òªï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½á¡±ï¿½ë£ï¿½ð¦ð¦ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ò²è¥ï¿½ë£ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ç»ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½è¤ï¿½ï¿½ï¿½ï¿½ñ§ï¿½ï¿½ï¿½â£¬ï¿½ï¿½ï¿½ï¿½ã´ï¿½ï¿½ï¿½â¶ï¿½ï¿½ø£ï¿½ï¿½ï¿½ï¿½ï¿½ò²ò»ï¿½ï¿½è¥ï¿½ï¿½ï¿½ï¿½ï¿½é¡ï¿½
������ê¾ï¿½ï¿½ï¿½ï¿½í¼
����ê¦ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ú¸ï¿½ê²ã´ï¿½ø£ï¿½
������ñ§ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½û²ï¿½í¼ï¿½ï¿½ï¿½ø´ð¡££ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½â£ºï¿½ð¼ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½
����ê¦ï¿½ï¿½ö§ï¿½ï¿½ð¦ð¦ï¿½ï¿½í¬ñ§ï¿½ï¿½ï¿½ï¿½ï¿½
�������ü°ï¿½ï¿½ï¿½ëµëµï¿½ï¿½ï¿½ï¿½ï¿½ð£¿£ï¿½ï¿½ï¿½ï¿½é£º3+2=5��
����ê¦ï¿½ï¿½ö§ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ð¡ï¿½ï¿½ï¿½ñ¾ï¿½ï¿½ï¿½
������ò²ï¿½ï¿½ëµï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ð£¿£ï¿½2+3=5��
����ê¦ï¿½ï¿½ï¿½ï¿½ï¿½çµï¿½ï¿½ï¿½ë��è·ï¿½ï¿½ï¿½ï¿½îªê²ã´ï¿½ï¿½
��������ñ§ï¿½ï¿½ï¿½ø´ï¿½ï¿½ï¿½ï¿½ï¿½ü½ï¿½ï¿½ï¿½é¡£ï¿½ï¿½ï¿½ï¿½ï¿½é£º3+2=2+3��
����2����1����í¬ñ§4��å®í¬ñ§õ¾ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ð¼ä£¬ï¿½ï¿½ñ§ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ñ§ï¿½ï¿½ï¿½â£¬ï¿½ï¿½ï¿½ï¿½ê½ï¿½ï¿½ð¡££ï¿½ï¿½ï¿½ßºï¿½ï¿½ò±ßµï¿½ð¡ï¿½ï¿½ï¿½ñ»ï¿½ï¿½ð²ï¿½í¬ï¿½ï¿½ï¿½ï¿½ê½ï¿½ï¿½ï¿½ö£ï¿½ï¿½ù´ï¿½ï¿½ï¿½ï¿½ó·ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½é£ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ê½
����ê¦ï¿½ï¿½ï¿½ï¿½ï¿½ç´ó¸õ²åµä»î¶¯ï¿½ð·ï¿½ï¿½ï¿½ï¿½ï¿½ê²ã´ï¿½ï¿½ï¿½ï¿½ï¿½ä¸ï¿½ð¡ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ß´ï¿½ò£ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ó£ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½î»ï¿½ã£ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ä£©
����3����ï·
������������ê¦ï¿½ï¿½ï¿½ï¿½ï¿½ð¡ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ò»ï¿½ï¿½ï¿½ï¿½ï·ï¿½ï¿½ï¿½ò³ï¿½1��ð¡ï¿½ì»¨ï¿½ï¿½ï¿½úºú°ï¿½ï¿½ò»ï¿½ß£ï¿½ï¿½ï¿½ï¿½ï¿½2î»ï¿½ãµï¿½ð¡ï¿½ì»¨ï¿½ï¿½ð¡ï¿½ï¿½ï¿½ñ°ï¿½ï¿½ï¿½ï¿½çµï¿½ð¡ï¿½ì»¨ï¿½ï¿½ï¿½ï¿½ò»ï¿½ï¿½è»ï¿½ï¿½ï¿½ï¿½ò»ï¿½ï¿½ð¡ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ëµò»ï¿½ï¿½ï¿½ï¿½ï¿½â¡£
�����ò¿ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ê½ï¿½ï¿½1+2=3
�����㻹������������ê½ï¿½ï¿½
������������1���3��ð¡ï¿½ì»¨ï¿½ï¿½í¬ï¿½ï¿½ï¿½ï¿½é¡ï¿½ï¿½ï¿½ñ§ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ò»ï¿½ï¿½í¼ï¿½ï¿½ï¿½ï¿½ï¿½ç¿ï¿½ï¿½ï¿½ð´ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ó·ï¿½ï¿½ï¿½ê½ï¿½ä¡ï¿½
����������ï°ï¿½ò»ï¿½ï¿½
����4���
����������ç°ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ò»ï¿½é£¬ò²ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï·ï¿½ï¿½ò»ï¿½ë°ï¿½ñ§ï¿½ß£ï¿½ï¿½ï¿½ï¿½ë¸ï¿½ëµò»ï¿½ï¿½ï¿½ó·ï¿½ï¿½ï¿½ê½ï¿½ï¿½
������ñ§ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ß¸ï¿½ï¿½ï¿½2�����ð³ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ê½ò»ï¿½ï¿½ê±ï¿½ï¿½ï¿½ï¿½ê¦òªëµï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ê½ï¿½ï¿½í¬ê±ï¿½ï¿½ö»ï¿½ï¿½ï¿½ï¿½ò»ï¿½ï¿½ï¿½ï¿½ê½ï¿½ï¿½
�����ä£ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ò»ï¿½ï¿½
����1����ê¾ï¿½ï¿½ï¿½ï¿½ò»ï¿½ô¡ï¿½ï¿½ï¿½í¼ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ñ§ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½â£¬ï¿½ï¿½ï¿½ï¿½ó·ï¿½ï¿½ï¿½ï¿½â£¬ï¿½ï¿½ï¿½ð³ï¿½ï¿½ï¿½ê½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½í¬ñ§ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½
����2����ê¾ï¿½ï¿½ï¿½ï¿½ò»ï¿½ô¡ï¿½ï¿½ï¿½í¼ï¿½ï¿½
������������������ã´ï¿½ï¿½ä¼ó·ï¿½ï¿½ï¿½ï¿½â£¬ï¿½ç³ï¿½ï¿½ï¿½ï¿½ë£ï¿½ï¿½ï¿½ñ½ï¿½ï¿½ì¿´ï¿½ï¿½ï¿½ä¶ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ã³ï¿½ï¿½ï¿½ï¿½ê£ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ê²ã´ï¿½ï¿½
������ê¦ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½×¡ï¿½ë£ï¿½òªï¿½ð³ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ó·ï¿½ï¿½ï¿½ê½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ã´ï¿½ï¿½ï¿½ï¿½
����3�����ø´ð£¬¶ï¿½ñ§ï¿½ï¿½ï¿½ð³ï¿½ï¿½ï¿½ï¿½ï¿½è·ï¿½ï¿½ê½ï¿½ï¿½òªï¿½ï¿½ï¿½ð¿ï¶ï¿½ï¿½í±ï¿½ï¿½ï¡£
��������������ö£ï¿½
�����壺��ò¶ï¿½ï¿½ï¿½ï¿½ï¿½ò»ï¿½ï¿½
����1��ê¦ï¿½ï¿½ê¾ï¿½ï¿½ö¸ï¿½ï¿½ï¿½ï¿½ñ§ï¿½ï¿½ï¿½ï¿½ê½ï¿½ï¿½è»ï¿½ï¿½ö¸ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ò»ï¿½ï¿½ï¿½ï¿½ò»ï¿½â¡£
����2��ñ§ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½25ò³ï¿½ï¿½2��3�⡣è»ï¿½ï¿½ã±¨
����3��������
������10��ñ§ï¿½ï¿½ì¨õ¾ï¿½ï¿½ò»ï¿½å¡ï¿½ï¿½ï¿½ï¿½ê£ï¿½ï¿½ï¿½ï¿½ð¼ï¿½ï¿½ï¿½ð¡ï¿½ï¿½ï¿½ñ£ï¿½
����ö¸ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½1�ë£ï¿½ï¿½ï¿½ï¿½ê£ï¿½ï¿½ï¿½ï¿½åµú¼ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ð²ï¿½í¬ï¿½ï¿½ï¿½ï¿½ï¿½
����ö¸ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½1�ë£ï¿½ï¿½ï¿½ï¿½ê£ï¿½ï¿½ï¿½ï¿½åµú¼ï¿½ï¿½ï¿½
��������ñ§ï¿½ï¿½ï¿½ü½á£ºí¬ò»ï¿½ï¿½ï¿½ï¿½ï¿½â£¬ï¿½ó²ï¿½í¬ï¿½ç¶è¿ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ð²ï¿½í¬ï¿½ä½ï¿½ï¿½ï¿½ï¿½
����4�������ò»ï¿½ï¿½ï¿½ï¿½5�⣬���òªï¿½ï¿½ï¿½ï¿½ï¿½ò¶ï¿½ï¿½ï¿½ï¿½ï¿½í¼ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½â£¬ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ð³ï¿½ï¿½ï¿½ê½ï¿½ï¿½è»ï¿½ï¿½ï¿½ò½ï¿½ï¿½ï¿½ï¿½ï¿½
��������������ë¼ï¿½ï¿½ï¿½ï¿½ð¡ï¿½á£º
������ê±ï¿½ï¿½ï¿½ï¿½ò»ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ò»èºï¿½ï¿½ï¿½ó£ï¿½ï¿½ï¿½ï¿½ï¿½ã¿ö»ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï³ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ó£ï¿½ï¿½ï¿½ï¿½ï³ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ó¡ï¿½ï¿½ï¿½ò»ï¿½ì£¬ï¿½ï¿½èºï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ë£ï¿½ëµï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ë£ï¿½ï¿½ï¿½îªê²ã´ï¿½ï¿½ï¿½ï¿½ï¿½ù¸ï¿½ï¿½ï¿½ï¿½ç³ï¿½ò»ï¿½ï¿½ï¿½ø£ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ëµï¿½ï¿½ï¿½ï¿½ï¿½å£ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½é¡ï¿½ï¿½ï¿½ï¿½ï³ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ó£ï¿½ï¿½ï¿½ï¿½ï¶ï¿½ò»ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ó¡ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ë°é¡ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ó¶ï¿½ï¿½ï¿½ï¿½ëµäµï¿½í·ëµï¿½ï¿½ï¿½ð£ï¿½ï¿½ð¡ï¿½
����í¬ñ§ï¿½ç£ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½â£ï¿½ï¿½ï¿½ï¿½ï¿½ê²ã´ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½
����ñ§ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½â£ï¿½ë¼ï¿½ï¿½ï¿½ï¿½ï¿½âµï¿½ï¿½ï¿½ï¿½ï¿½ê²ã´ï¿½ï¿½ñ§ï¿½ï¿½ï¿½â¡£
����í¨ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½â£ï¿½ï¿½ï¿½ï¿½ï¿½ñ§ï¿½ï¿½ï¿½ï¿½ñ§ï°ï¿½ï¿½è¤ï¿½ï¿½ï¿½ï¿½ï¿½ú¹ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ó·ï¿½ï¿½ä½ï¿½ï¿½ï¿½ï¿½é¡ï¿½
你有几辆车篇四
本课内容在教材第24-25页。主要内容:“摆一摆”,“试一试”,“练一练”;“加法交换律”的.含义。
1、使学生初步感知“两个数相加,交换加数的位置,得数不变”的加法交换律。
2、使学生初步学会从不同角度观察事物,渗透辩证统一的思想观念。
3、通过情景活动,培养学生提出问题、解决问题的能力和语言表达能力。
4、通过动手操作、合作学习、互相交流等形式使学生感知“加法交换律”。
5、让学生亲身从不同角度观察同一事物、提出问题、发现规律等过程,培养学生学习加法的兴趣和信心。
通过仔细观察,动手操作,进一步理解加法交换律的含义。
根据具体情景,灵活列出不同的加法算式。
1、第24页主题图、“试一试”图
2、贴花4朵。
学具
一、复习
1+2= 2+1= 1+3= 3+1= 2+3= 3+2=
4+1= 1+4= 5+0= 0+5= 2+2=
二、活动过程
1、故事引入(回答好的小朋友奖励小红花)
现在生活越来越好了,买汽车的人也越来越多了。这不,体育中心又要开“汽车博览会”了,笑笑和淘气也去了,而且他们还发现了有趣的数学问题,是怎么回事儿呢,我们也一起去看看吧。
出示主题图
师:他们在干什么呢?
让学生在认真观察图意后回答。(板书课题:有几辆车)
师:支持笑笑的同学请举手
你能帮她说说理由吗?(板书:3+2=5)
师:支持淘气的小朋友举手
你也能说出理由吗?(2+3=5)
师:他们倒底谁正确啊?为什么?
多请学生回答,最后总结板书。(板书:3+2=2+3)
2、请1个男同学4个女同学站到教室中间,让学生题出数学问题,并列式解答。(左边和右边的小朋友会有不同的算式出现,再次领会加法交换律)板书算式
师:你们从刚才的活动中发现了什么?有哪个小朋友想告诉大家?(两个数相加,交换加数的位置,得数不变)
3、游戏
接下来老师还想跟小朋友做一个游戏,我出1朵小红花贴在黑板的一边,再请2位得到小红花的小朋友把你们的小红花贴在一起,然后请一个小朋友来说一个问题。
我可以这样列算式:1+2=3
你还可以怎样列算式?
再来贴上1朵和3朵小红花,同上完成。让学生明白一个图我们是可以写出两个加法算式的。
完成书上摆一摆
4、活动
下面请前后两个人一组,也像我们这样做游戏,一人摆学具,两人各说一个加法算式。
当学生提出两边各摆2个,列出的两个算式一样时,老师要说明:两个算式相同时,只需列一个算式.
四:我想试一试
1、出示“试一试”左图。引导学生理解题意,提出加法问题,并列出算式。(可与同学交流)
2、出示“试一试”右图。
他们俩发现了这么多的加法问题,非常高兴,想把今天看到的都画下来.他们拿出蜡笔,发现了什么?
教师:他们俩被难住了,要列出两个加法算式,该怎么列呢
3、听回答,对学生列出的正确算式,要进行肯定和表扬。
(活动:拍拍手)
五:大家动手练一练
1、师出示手指,请学生列式。然后指导完成练一练第一题。
2、学生理解题意后独立完成25页第2、3题。然后汇报
3、动起来
找10名学生台站成一排。提问:共有几个小朋友?
指定其中1人,提问:她排第几个?你有不同意见吗?
指定队伍中任意1人,提问:我排第几?
引导学生总结:同一个问题,从不同角度看,可以有不同的结果。
4、完成练一练第5题,提出要求:请大家独立看图,提出问题,在书上列出算式,然后大家交流。
故事引出的思考并小结:
古时候,有一个人养了一群猴子,他给每只猴子早上吃三个桃子,晚上吃两个桃子。有一天,这群猴子闹起来了,说:“主人,你为什么晚上少给我们吃一个呢?”,于是主人想了想说:“嗯,那这样吧。早上吃两个桃子,晚上多一个,吃三个桃子。这样总行了吧。”猴子都高兴的点头说:行,行。
同学们,听了这个故事,你有什么看法?
学生倾听故事,思考故事当中有什么数学问题。
通过听故事,激发学生的学习兴趣,并在故事中领悟加法的交换律。
你有几辆车篇五
����1��������öªï¿½ó²ï¿½í¬ï¿½ä¹û²ï¿½ç¶ï¿½ï¿½ð³ï¿½ï¿½ï¿½í¬ï¿½ï¿½ï¿½ï¿½ê½ï¿½ï¿½
����2����ò»ï¿½ï¿½ï¿½ï¿½á¡°ï¿½ó·ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½é¡ï¿½ï¿½äºï¿½ï¿½å¡£
�����øµï¿½
�����������⡰�ó·ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½é¡ï¿½ï¿½äºï¿½ï¿½å¡£
�����ñµï¿½
�������⡰�ó·ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½é¡ï¿½ï¿½äºï¿½ï¿½å¡£
�����ì¾ï¿½
�����î¼ï¿½
�����绯�ì¾ï¿½
��������
����ò»ï¿½ï¿½ï¿½ï¿½ò»ï¿½ï¿½:
����(��p24)í£ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½í£ï¿½ëºü¶ï¿½ï¿½ï¿½ï¿½ï¿½,í¬ñ§ï¿½ç¿ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ë�������ñ§ï¿½ï¿½ï¿½ï¿½?���������ê½?è»ï¿½ï¿½ï¿½ú½ï¿½ï¿½ð±è½ï¿½,���ö¹ï¿½ï¿½é¡ï¿½
����3+2=5 2+3=5
����3+2=2+3
����������ò»ï¿½ú¡ï¿½ï¿½ï¿½ò»ï¿½ï¿½:
����ñ§ï¿½ï¿½ï¿½û²ï¿½ï¿½ï¿½ï¿½ðµï¿½í¼,�������ç¸ï¿½ï¿½ï¿½í¼ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½â¡£ï¿½ú½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ê±,��ê¦ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ñ§ï¿½ï¿½ï¿½ð³ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½í¬ï¿½ï¿½ï¿½ï¿½ê½,���è½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ê½ï¿½ï¿½ï¿½ï¿½í¬,��ñ§ï¿½ï¿½ö±ï¿½ûµï¿½ï¿½ï¿½ï¿½ï¿½ó·ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½éµäºï¿½ï¿½å¡£
������ò»ï¿½ï¿½,��ñ§ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½,ע������ñ§ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½,��������ä±ï¿½ï¿½ï¿½í¼ï¿½â¡£
����������ò»ï¿½ï¿½:
����1��(��p24)��ñ§ï¿½ï¿½ï¿½è¶ï¿½ï¿½ö°ï¿½ò»ï¿½ï¿½,������ï°ï¿½ï¿½
����2����ñ§ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½û²ï¿½ï¿½ï¿½ï¿½ðµï¿½í¼,����í¼ï¿½ï¿½,��ê½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½â¡£ñ§ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ð³ï¿½ï¿½ï¿½í¬ï¿½ä¼ó·ï¿½ï¿½ï¿½ê½:2+3=5,3+2=5,1+4=5��,ö»òªñ§ï¿½ï¿½ï¿½ï¿½ëµï¿½ï¿½ï¿½ï¿½ï¿½êµï¿½ï¿½ï¿½ï¿½ï¿½,��ê¦ï¿½ï¿½ó¦ï¿½ã¸ï¿½ï¿½ï¿½ï¶ï¿½ï¿½ï¿½
������ñ§ï¿½ï¿½ï¿½ï¿½
����3����ï·:��10��ñ§ï¿½ï¿½ï¿½å³ï¿½ò»ï¿½ï¿½,����������ñ§ï¿½ï¿½,è»ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½:**�åµú¼ï¿½ï¿½ï¿½ñ½?(ñ§ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ö»ø´ï¿½,��ñ§ï¿½ï¿½ï¿½ï¿½è·ï¿½ø´ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ä¡ï¿½)
����4����ê¾ð¡ï¿½ï¿½ï¿½í¼æ¬,��ñ§ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½í¼æ¬ï¿½ï¿½ï¿½ï¿½ï¿½,í¬ï¿½ï¿½ö®ï¿½ï¿½ï¿½à»¥ï¿½ï¿½ï¿½ï¿½,���p25�äµï¿½5�⡣
������ �� �� ��
������ ��
����3+2=5 2+3=5
����3+2= 2+3
������ñ§
�������
�����ù²ï¿½ï¿½ï¿½ñ§ï¿½ï¿½ã»ï¿½ð°ï¿½ï¿½ï¿½í¼ï¿½ï¿½ï¿½ï¿½ë¼ï¿½ð³ï¿½ï¿½ï¿½ê½,ó¦ï¿½ï¿½ï¿½è¼°ê±ï¿½ä¾ï¿½ï¿½ï¿½ï¿½ï¿½
你有几辆车篇六
����
������������î³ì±ï¿½×¼êµï¿½ï¿½ì¿ï¿½ï¿½ï¿½(��ê¦ï¿½ï¿½ï¿½)ò»ï¿½ê¼¶ï¿½ï²ï¿½ï¿½23����24ò³ï¿½ï¿½
����
����í¨ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ð¼ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ò»ï¿½ï¿½ï¿½â£¬ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½öªï¿½ó²ï¿½í¬ï¿½ä¹û²ï¿½ç¶è³ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ð³ï¿½ï¿½ï¿½í¬ï¿½ï¿½ï¿½ï¿½ê½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½á¡°ï¿½ó·ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½é¡ï¿½ï¿½äºï¿½ï¿½ï¿½
���������뷽����í¨ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ò»ï¿½ï¿½ñ§ï¿½ï¿½ï¿½â£¬ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½öªï¿½ó²ï¿½í¬ï¿½ç¶è³ï¿½ï¿½ï¿½ï¿½ï¿½
����
��������ñ§ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¸ï¿½âµä¹û²ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½
����
�����ó²ï¿½í¬ï¿½ä¹û²ï¿½ç¶è³ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ð³ï¿½ï¿½ï¿½í¬ï¿½ï¿½ï¿½ï¿½ê½]
����
����������ᡱ�ó·ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½é¡ï¿½ï¿½äºï¿½ï¿½ï¿½
�����ì¾ï¿½×¼ï¿½ï¿½ï¿½ï¿½ð¡ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½í¼ï¿½ï¿½æ¤ï¿½ï¿½ï¿½ð¡¢ºì»¨ï¿½ï¿½ï¿½ï¿½æ¬
����
����ò»ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½×¼ï¿½ï¿½
����1��(��ê¾ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ð¦ð¦í¼æ¬)������ê¶ï¿½ï¿½ï¿½ï¿½?ï²ï¿½ï¿½ï²ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½?�����������çµä¿ï¿½ï¿½ïºï¿½ï¿½ï¿½ï¿½ï¿½ò»ï¿½ï¿½ñ§ï°?
����2��ê¦ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ò»ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½û²ì¡¢ï¿½ï¿½ï¿½ï¿½ï¿½ô½ï¿½ï¿½ð¡ï¿½ï¿½ï¿½é£¬ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ñ§ï¿½ï¿½â·ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ò»ï¿½ï¿½í£ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ò»ï¿½ï¿½ï¿½ï¿½ñ§ï¿½ï¿½ï¿½â£¬ï¿½í°ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ñ§ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ð¡ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ò»ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ç¸ï¿ï¿½ï¿½ï¿½ï¿½ï¿½ò»ï¿½ï¿½ê²ã´ï¿½ï¿½ï¿½â£¬ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ð¦ð¦ï¿½ï¿½ò»ï¿½ê¼¶ñ§ï¿½ï¿½ï¿½ç³ï¿½ï²ï¿½ï¿½ï¿½äºï¿½ï¿½ï¿½ï¿½ñ¡ï¿½ï¿½ï¿½ò»ï¿½ï¿½ê¼ï¿½í°ï¿½ï¿½ï¿½ï¿½ï¿½îªñ§ï°ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ë£¬ï¿½ï¿½ï¿½ï¿½ñ§ï¿½ï¿½ï¿½ï¿½ñ§ï°ï¿½ï¿½è¤ï¿½ï¿½)
��������ì½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½(��ê¦ï¿½ñ½ï¿½ì¨ï¿½ï¿½ï¿½ï¿½ï¿½ã³ï¿½í£ï¿½ï¿½ï¿½ï¿½)
�����塢��������ó·ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½éµäºï¿½ï¿½ï¿½
����1��ê¦ï¿½ï¿½í¨ï¿½ï¿½ï¿½û²ï¿½ï¿½ã¿´ï¿½ï¿½ï¿½ï¿½ê²ã´?
��������í£ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½3�������ò±ï¿½ï¿½ï¿½2�����������ò±ï¿½ï¿½ï¿½2�����������3������
����ê¦ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ê²ã´ï¿½ï¿½ñ§ï¿½ï¿½ï¿½ï¿½?
��������í£ï¿½ï¿½ï¿½ï¿½ò»ï¿½ï¿½ï¿½ð¼ï¿½ï¿½ï¿½ï¿½ï¿½?
����ê¦ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ê½?
����ê¦ö¸ï¿½ï¿½ï¿½ï¿½ê½ï¿½ð¡ï¿½3��2��5������ê¾ê²ã´?
����ê¦ï¿½ï¿½ï¿½ï¿½ï¸ï¿½û²ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ê½ï¿½ï¿½ï¿½ï¿½ï¿½ü·ï¿½ï¿½ï¿½ê²ã´?
�����������çµï¿½ï¿½ï¿½5����í¬ï¿½ï¿½ï¿½ç½ï¿½ï¿½ï¿½ï¿½ï¿½3��2î»ï¿½ï¿½
����������������ëµ3+2=2+3
����2����ñ§ï¿½ï¿½ï¿½ï¿½ñ§ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ð¡ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ò»ï¿½ú¡ï¿½
����(��êµï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ðµä»î¶¯ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ö£ï¿½ï¿½ï¿½ñ§ï¿½ï¿½ï¿½ô¼ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½â£¬ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½â£¬ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ñ§ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ö¸ï¿½ï¿½üµï¿½ï¿½ï¿½ñ§ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ïµï¿½ï¿½ò²ï¿½ïºãµï¿½ï¿½ï¿½ï¿½ö³ï¿½ñ§ï¿½ï¿½ñ§ï°ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ê¶ï¿½ï¿½)
������)����ò»ï¿½ï¿½
����ê¦ï¿½ï¿½ð¦ð¦ï¿½ï¿½ï¿½ï¿½û²ì°®ï¿½ï¿½ï¿½ô½î£¬ï¿½ï¿½ê¦òªï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ð¡ï¿½ì»¨ï¿½ï¿½(ê¦ï¿½úºú°ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½3��컨)��ð¡ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ò²òªï¿½ï¿½ñ§ï°ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ü´ï¿½ï¿½ï¿½ð©ï¿½ì»¨ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ñ§ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½?
����1��ö¸ï¿½ï¿½ï¿½ø´ï¿½ï¿½ï¿½ï¿½ñ§ï¿½ï¿½ï¿½ï¿½ï¿½ö°ï¿½ò»ï¿½ú£ï¿½ï¿½ð³ï¿½ï¿½ï¿½ê½
����ê¦ï¿½ï¿½ð¡ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ò²ï¿½ï¿½ï¿½öµã°ï¿½ï¿½ï¿½ï¿½ï¿½ê¦ò²ï¿½ï¿½ð¡ï¿½ï¿½ï¿½ï¿½ï¿½ç½ï¿½ï¿½ï¿½ï¿½ì»¨ï¿½ï¿½(ê¦ï¿½ï¿½ï¿½ï¿½3��컨)
����2��ñ§ï¿½ï¿½ï¿½ö¸ï¿½ï¿½ý½ï¿½ê¦ï¿½ï¿½ï¿½äºì»¨ï¿½ï¿½ëµï¿½ï¿½ê½
����(��ò»ï¿½úµï¿½ï¿½ï¿½æ£ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ñ§ï¿½ï¿½òªï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ðµï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ë£ï¿½ê¹ñ§ï¿½ï¿½ï¿½ï¿½ò»ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ñ§ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ß£ï¿½ï¿½ï¿½ñ§ï¿½ï¿½ ���çµï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ïµ)
����(��)����ò»ï¿½ï¿½
������ê¦ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ëµí¼ï¿½ï¿½
������ð¡ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½
������è«ï¿½à½»ï¿½ï¿½
���������ü½á½»ï¿½ï¿½ï¿½ï¿½í¨ï¿½ï¿½ï¿½ï¿½ï¿½ñ§ï°ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ú¿ï¿½ï¿½ð·ï¿½ï¿½ï¿½ï¿½ï¿½ê²ã´?�������ô¼ï¿½ï¿½ä»ï¿½ëµò»ëµï¿½ï¿½?
�����ä¡ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï°
����1��������ï°
������ê¦ï¿½ï¿½ï¿½ï¿½ð¡ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ò»ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï·ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ê¦ï¿½ä¼ï¿½ï¿½â£ï¿½è»ï¿½ï¿½ï¿½ï¿½ï¿½äµäºï¿½ï¿½ï¿½ï¿½äµäºï¿½ï¿½ï¿½ï¿½ï¿½òªï¿½ï¿½
�������磺ê¦ï¿½ä£ï¿½ï¿½ï¿½
�������ä£ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½
����ê¦ï¿½ï¿½ë�ü¸ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½äµä´ï¿½ï¿½ï¿½ï¿½ð³ï¿½ï¿½ï¿½ê½?
��������1+4=5 4+1=5
����2���ô±ï¿½ï¿½ï¿½ï°
������ê¦ï¿½ñµï¿½25ò³ï¿½ðµï¿½2�����ê½ð´ï¿½ú¿ï¿½æ¬ï¿½ï£ï¿½ê¦ï¿½ù¿ï¿½æ¬ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½
����3��ó¦ï¿½ï¿½ï¿½ï¿½ï° ê¦ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ò´ï¿½ï¿½ï¿½ò»ð©ð¡ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ê½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½õªï¿½äµï¿½ï¿½ï¿½õªï¿½äµï¿½ï¿½ï¿½ï¿½ãµï¿½ï¿½ï¿½ê½ï¿½ï¿½ñ§ï¿½ï¿½ï¿½ï¿½ï¿½ð±è½ï£ï¿½ã»ï¿½ãµï¿½ï¿½ï¿½ê½ï¿½ï¿½í¬ñ§ï¿½ï¿½ð¡ï¿½ï¿½ï¿½ð¡ï¿½(�ñµï¿½25ò³ï¿½ï¿½3��ð´ï¿½ú¿ï¿½æ¬ï¿½ï¿½)
����4����ñ§ï¿½ï¿½ä£ï¿½ï¿½ï¿½ï¿½ýµï¿½4��
����5������ñ§ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½í¼ï¿½ï¿½ó£¬¶ï¿½ï¿½ï¿½ï¿½ï¿½ê½ï¿½ï¿½ï¿½ï¿½è«ï¿½à½»ï¿½ï¿½