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小学数学新冀教版三年级下册名山一日游教案(2026春)

小学数学新冀教版三年级下册名山一日游教案(2026春)

名山一日游

【教学内容】

教科书第5253

【教学目标】

1.结合名山一日游” 情境,能运用乘法、加法等知识解决租车、购票、餐饮等实际问题。

2.学会分析不同方案的费用,掌握最值计算的思路,提升逻辑推理和解决综合问题的能力。

3.感受数学与生活的紧密联系,培养合理规划、优化选择的意识,体验数学的实用价值。

【教学重点】能根据实际情境设计不同方案,准确计算各项费用并找出最值

【教学难点】分析租车、购票方案的合理性,理清最值计算的逻辑,综合运用多知识点解决问题。

【教学准备】多媒体课件、练习纸等

【教学过程】

一、创设情境,引入新课

师:“同学们,生活中我们经常会参加旅游活动,组织一次成功的旅游需要考虑哪些事情呢?

(稍作停顿,引导学生发言)

今天我们就来当一回小组织者,帮某公司安排 50 位外国客人的名山一日游活动。活动包括上午上山、中午就餐、下午返回,需要解决租车、上下山购票、午餐安排这几个核心问题,最后还要算出这次活动最少和最多花多少钱。大家有信心完成吗?

生:“有!”

师:“那我们就一步步来梳理这些问题,逐个解决。”

二、自主活动,探索新知

1.租车问题

师:“首先要解决租车问题,我们来看租车处的信息:有 14 座车(最多坐 13 位游客)和27 座车(按实际载客量推测)两种选择,50 位客人需要租多少辆车?有几种租车方案?

 1可以租 27 座车!

 2也可以租 14 座车,或者两种车搭配租!

师:“大家说得都对。我们先看已知方案:租 4  14 座车;租 2  27 座车,大家先算这两种方案的租金各是多少?

(学生计算,教师巡视)

师:“谁来说说结果?”

生:“租 4  14 座车:4×300=1200元;租 2  27 座车:2×500=1000 元!

师:“还有其他租车方案吗?比如租 1  27 座车,剩下的人坐 14 座车,需要多少辆?费用是多少?

生:“50-26=24 人,13+13=2624,所以租 1  27 座车和 2  14 座车,费用是 500+2×300=1100 元!

师:“对比这三种方案,哪种最省钱?哪种可能费用较高?”

生:“租 2  27 座车最省钱,租 4  14 座车费用较高!

师:“没错,租车时要在保证所有人坐下的前提下,尽量减少空位,这样更划算。我们把不同租车方案的费用记录下来,后面算总费用时要用。”

2.上山和下山问题:选择购票方式,计算购票费用

师:“解决了租车问题,接下来是上下山的交通。已知上山可以坐缆车,下山可以步行(只买单程票),也可以根据客人意见,年龄大的买往返票。 

方案一:所有人都买上山单程票;

方案二:部分人买往返票(假设 20 人买往返,30 人买单程)。大家分别算出这两种方案的购票费用?

(学生计算)

师:“谁来分享你的计算结果?”

 1方案一:50×80=4000 元!

 2方案二:20×150+30×80=3000+2400=5400元!

师:“为什么方案二费用更高?”

生:“因为往返票比两张单程票便宜,但部分人买往返票还是会比所有人买单程票花费多!”

师:“说得对!购票方案的选择会影响总费用,我们把两种方案的费用也记录下来,后面综合计算。”

3.安排午餐:选择餐饮标准,计算午餐费用

师:“中午就餐需要安排午餐,已知午餐有两种选择:中等标准每位 45 元,较高标准每位 50元。50 位客人,两种午餐方案的费用分别是多少?大家快速算一算!(学生计算)

师:“谁来说说结果?”

生:“中等标准:50×45=2250 元;较高标准:50×50=2500 元!

师:“非常快!午餐费用的计算很直接,就是人数乘单价,两种方案的费用差异很明显,我们也把它记录下来。”

4.算一算:总费用的最值计算

师:“现在我们已经有了租车、购票、午餐的不同方案及费用,要算这次活动的最少和最多花费,应该怎么组合这些方案呢?”

生:“最少花费就是把每种项目的最便宜方案组合起来,最多花费就是把每种项目的最贵方案组合起来!”

师:“太聪明了!”

(学生计算,教师巡视指导)

师:“谁来展示你的计算过程和结果?”

 1最少总费用:1000+4000+2250=7250元!

 2最多总费用:1200+5400+2500=9100元!

三、课堂总结

师:“今天我们通过‘名山一日游’的实践活动,解决了租车、购票、午餐安排和费用最值等问题,大家都表现得很出色。谁来说说你今天的收获?”

 1我学会了设计租车和购票方案,还能计算费用。

 2我知道了怎么算最少和最多花多少钱,就是把每个项目的最值组合起来。

 3我觉得数学在生活中很有用,能帮我们做规划。

师:“大家的收获真不少!课后大家可以和家人一起,设计一次家庭短途旅游的方案,计算一下大概需要花费多少钱,把今天学到的知识用到生活中去。” 

【板书设计】

名山一日游

核心任务:租车、上下山购票、午餐安排、费用最值

解题方法:梳理条件→设计方案→计算费用→组合最值

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  1. CONNECT:[ UseTime:0.000465s ] mysql:host=127.0.0.1;port=3306;dbname=wenku;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000843s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000330s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000379s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000721s ]
  6. SELECT * FROM `set` [ RunTime:0.000225s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000547s ]
  8. SELECT * FROM `article` WHERE `id` = 818745 LIMIT 1 [ RunTime:0.000430s ]
  9. UPDATE `article` SET `lasttime` = 1782853657 WHERE `id` = 818745 [ RunTime:0.003820s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 64 LIMIT 1 [ RunTime:0.000235s ]
  11. SELECT * FROM `article` WHERE `id` < 818745 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000428s ]
  12. SELECT * FROM `article` WHERE `id` > 818745 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000849s ]
  13. SELECT * FROM `article` WHERE `id` < 818745 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.000787s ]
  14. SELECT * FROM `article` WHERE `id` < 818745 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.002851s ]
  15. SELECT * FROM `article` WHERE `id` < 818745 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.001300s ]
0.170917s