资源描述:
《最新B4-U4-A教学讲义ppt.ppt》由会员上传分享,免费在线阅读,更多相关内容在教育资源-天天文库。
1、B4-U4-AanappleapplesWhatdotheysee?---Whatisthis?---Itisatomato.---Whatarethese?---They'retomatoes.whatdotheysee?---Whatisthis?---Itisacarrot.---Whatarethese?---They'recarrots.-------Whatarethese?-------They're______.Wow,they'reso___.Wow,they'reso___.Arethesecarrots?Arethese____?Yes,theyare.No,theyar
2、e’t.----Whatarethese?----Theyare____.----Arethese___?----Yes,theyare.-----No,theyaren't.Whatarethese?Whatarethese?They’retomatoes.They’recarrots.Arethesetomatoes?Arethesecarrots?Yes,theyare.Yes,theyare.Whatarethese?Whatarethese?They’retomatoes.They’recarrots.Arethesetomatoes?Arethesecarrots?Yes,the
3、yare.Yes,theyare.Whatcolorarethey?听录音,选出他们看到的西红柿是什么颜色的?A:they'rered.B:they'reyellow.Butthey'reyellow.They're_______.TrysomeHappytimegoodsouryum好的酸的美味的good=yumsarah:Lookatthese.Arethesecarrots?Unclewang:Yes,theyare.Mike:Wow,theyaresobig.Mike:Whatarethese?Unclewang:They'retomatoes.Mike:Buttheyareyello
4、w.Unclewang:Trysome,they'regood.Mike:Thanks.Yum.(我们应该)Respectthefarmer尊重农民Cherishthefood珍惜粮食Weshould一、写出下列单词的汉语意思。carrot()tomato()yum()these()big()二、翻译下列句子。Lookatthese !()They’resobig!()Whatarethese?()三、听录音,给下列句子排序。1、Whatarethese?2、Arethesecarrots?3、They’retomatoes.4、Wow!They’resobig!5、Trysome!They’
5、regood.6、Yes,theyare.7、Thanks,yum.8、But,they’reyellow.Listentothetapeandreadthedialogue听读对话Usethesentencespatternstodescribethefarm运用所学句型,介绍一下农场Homework“希望工程”义演某文艺团体为“希望工程”募捐组织了一场义演,共售出1000张票,筹得票款6950元,成人票和学生票各售出多少张?(1)设售出的学生票为x张,则可得:学生成人票数/张票款/元x5x1000-x8(1000-x)认真阅读上题,你能得出哪些等量关系?成人票数+学生票数=1000张成人票
6、款+学生票款=6950元学生成人合计票数/张票款/元根据等量关系,可列方程:解得:x=350根据上面的等量关系可得:3506501750520010006950学生成人票数/张票款/元y6950-y学生票数+成人票数=1000某文艺团体为“希望工程”募捐组织了一场义演,共售出1000张票,筹得票款6950元,成人票和学生票各售出多少张?“鸡兔同笼”问题我国古算书《孙子算经》中一个著名的数学问题。其内容是:“今有雉兔同笼,上有三十五头,下有九十四足。问雉兔各几何。”后人称这类问题为鸡兔同笼问题。变式思考:若上有20头,则下最多有多少个脚,最少有多少个脚?请你想一想:鸡兔同笼问题与希望工程义演问题
7、有什么联系?变式练习:将这问题中的“共售1000张票”改为“成人票比学生票多300张”,成人票和学生票共售出多少张?某文艺团体为“希望工程”募捐组织了一场义演,共售出1000张票, 筹得票款6950元,成人票和学生票各售出多少张?成人票比学生票多300张如果票价和售出的总票数都不变,所得票款可能是6930元吗?如果可能,成人票比学生票多售出多少张?6930课堂小结,知识升华请你谈谈本节课的收