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幼儿园教师大班科学:汽车过大桥教案+PPT课件备课图片

  • 2026-06-17 10:56:35
幼儿园教师大班科学:汽车过大桥教案+PPT课件备课图片

大班科学:汽车过大桥

活动目标  1、通过动手操作,感知10的分解组成,掌握10的9种分法。            2、在感知数的分解组成的基础上,掌握数组成的递增、递减规律和互相交换的规律。            3、发展观察力、分析力,培养幼儿对数学的兴趣。            4、提高逻辑推理能力,养成有序做事的好习惯。            5、对数字产生兴趣。          活动重点难点  活动重点:感知整体与部分的关系,学习并记录10的9种分法。            活动难点:总结归纳10以内数的分解和组成规律。          活动准备  1、10以内数的分解和组成教学视频光盘一张。            2、若干小矮人图片和小房子。            3、数字卡片若干。          活动过程            (一)、问答形式复习以前学过的数的组成和分解。如:            师:我来问,你来答,9可以分成3和几?(幼儿边拍手边回答)            (二)、学习10 的组成和分解。            1、故事导入。教师:在一座茂密的森林里,住着一位美丽的白雪公主,今天,白雪公主非常高兴,因为有小客人要到森林里作客,你们看,他们来了。            提问:            〈1〉来了几位小矮人?            〈2〉10位小矮人要住进两座小房子里,该怎么住呢?引出课题《10的分解与组成》。            2、幼儿动手操作,把10张小矮人卡片摆一摆,记一记来思考10的多种分法,帮助白雪公主做出不同的安排方法。            〈1〉把幼儿分成10组,每四人一组。            〈2〉每组请一名幼儿做记录,其余幼儿动手操作。            〈3〉教师根据幼儿操作情况总结10的9种分法:              10       10        10        10        10              ∧       ∧        ∧        ∧        ∧            1  9     2  8      3  7      4  6      5  5            9  1      8  2      7  3     6  4                           3、引导幼儿观察10的分解式,发现总结10以内数分解组成规律:除1以外,每个数分法的种类都比本身少1;把一个数分解成两个较小的数,所分成的两个数合起来就是原来的数,即整体大于部分;把一个数分成两部分,如果一部分增加1,另外一部分就减少个1,即递增递减规律;交换规律。            10            ∧               1   9                   2   8                 3   7                 4   6                 5   5              6   4              7   3               8   2              9   1                         (三) 、巩固练习                                          1、卡片填数                                            10        10        10       4  □       □  9            ∧       ∧         ∧        ∨           ∨            □  8     7  □     5  □       10         10            (四)游戏活动            1、“找朋友”。游戏规则:请前面手里拿卡片的小朋友找座位上的小朋友做“好朋友”,要求两数和起来是10。            2、火车开了。游戏规则:幼儿每人一张数字卡片,找和自己卡片上数字合起来是10的小朋友手拉手一起上火车,边唱《火车开了》歌曲边出活动室。

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  1. CONNECT:[ UseTime:0.001001s ] mysql:host=127.0.0.1;port=3306;dbname=a_sjds;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.001449s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.014703s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.003126s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.001426s ]
  6. SELECT * FROM `set` [ RunTime:0.002763s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.001590s ]
  8. SELECT * FROM `article` WHERE `id` = 504353 LIMIT 1 [ RunTime:0.020195s ]
  9. UPDATE `article` SET `lasttime` = 1782586728 WHERE `id` = 504353 [ RunTime:0.018434s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 64 LIMIT 1 [ RunTime:0.000282s ]
  11. SELECT * FROM `article` WHERE `id` < 504353 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000452s ]
  12. SELECT * FROM `article` WHERE `id` > 504353 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.013387s ]
  13. SELECT * FROM `article` WHERE `id` < 504353 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.006519s ]
  14. SELECT * FROM `article` WHERE `id` < 504353 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.012072s ]
  15. SELECT * FROM `article` WHERE `id` < 504353 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.004078s ]
0.249550s