四年级数学上册第2单元三位数除以两位数三位数除以两位数商末尾有0的除法教学课件冀教版

5.
460÷23＝ 20 36＝ 9……39
950÷19＝ 50 821÷36＝ 22……29
团Tiffany，a 16yearold girl，was very st September，her best friend，Sophie，moved abroad with her family because she had to continue her studies in America.She even said she would not come back for at least a few years. 1 “I was really sad the moment I heard the bad news and I didn't know what to do，” Tiffany recalled.“I shut myself in my room for a whole week.It was then that my aunt took me to a sports club one Saturday and I saw so many young people playing different kinds of sports there.I signed up for a beginner's course in volleyball and since then I have been playing this sport.Now I practice twice a week there.It is wonderful playing sports in this club and I have made lots of friends as well. 2 ” The most basic aim of playing sports is that you can improve your health even if you are not very good at sports.Besides，you can get to know a circle of people at your age while playing sports. 3 Since she joined the sports club，she has opened up herself and now she has become very active and enjoys meeting and talking with others. 1．It's polite for girls to kiss each other on the side of the face. 4．It's no big deal.For most people，that is one of the reasons why they join a sports club. 4 You don't have to sit down and talk to strangers.You go in for sports and it is easier to understand your partners on the same team.Now Tiffany is quite popular with her friends and she has also become more confident.团圆圆一家在台湾可受欢迎了 。每天 ，小朋 友们排 着长队 ，等着 跟它们 合影留 念。从 “排着 长队” 体现出 每天喜 欢它们 的人不 计其数 ，特别 受欢迎 。从“ 合影留 念”体 现出大 家都想 和大熊 猫留住 最美丽 的瞬间 以作纪 念。N othing can be accomplished without norms or standards.
40 17 6 8 0
68 0
答：需要17吨的集装箱40个。
试一试
720÷24
585÷28
458÷15
练一练
1.上海东方明珠电视塔的高度是468米，广州电视塔 的高度是600米。
自己提出问题，并解答。
2.下面是王华、李玲、刘小童跳绳比赛的成绩记录。
他们三个谁跳的快一些？
王华：792÷18＝44（下） 李玲：920÷23＝40（下） 答：他们三人王 刘小童：741÷19＝39（下） 华跳得快一些。
3.同学们帮果园摘苹果，上午摘了315千 克，下午摘了435千克，每25千克装一箱， 可以怎样装箱？
（315＋435）÷25 ＝750÷25 ＝30（箱） 答：可以装30箱。
4.一块长方形菜地，长是9米，宽是6米。 这块菜地一共收青菜648千克。平均每平 方米收青菜多少千克？
648÷（9×6） ＝648÷54 ＝12（千克） 答：平均每平方可以收青菜12千克。
春光粮油公司要出口680吨粮食。 680÷22＝______
680÷22＝3_1_（__个__）
先估计一下， 再用竖式计算。
30 22 6 8 0
66 2 0 剩下的20吨怎么办呢？
答：需要22吨的集装箱31个。
春光粮油公司要出口680吨粮食。如 果选用装17吨的集装箱，需要多少个？
680÷17＝_4_0_（__个_ ）
三位数除以两位数商 末尾有0的除法
教学目标
1、结合具体事例，经历自主尝试三位数除以 两位数、商两位数（商的末尾有0）的计算方 法的过程。 2、会笔算三位数除以两位数（商两位数）且 商的末尾有0法。 3、能在用已有知识和经验解决问题的过程中， 获得成功的体验。
春光粮油公司要出口680吨粮食。
观察情境图，说一说你发现了哪些数学信 息和要解决的问题？
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