冀教版七年级数学上册教案5.4.5 几何图形问题

5.4 一元一次方程的应用第5课时几何图形问题【教学目标】1.通过分析几何图形问题中的基本等量关系，建立方程解决问题.2.进一步了解一元一次方程在解决实际问题中的应用.【重点难点】重点：由几何图形中寻找等量关系，列一元一次方程解决问题.难点：在几何图形中寻找等量关系.【教学过程设计】(1)当t为何值时，AQ学生自主探究，完成后交流讨论教师点评、总结.AP＝(AB 【教学小结】【板书设计】5.5.5 几何图形问题1.分析几何图形问题中的等量关系2.根据等量关系列方程Unit12 Four seasons in one dayPart One 重点讲解一、重点单词、词组迅速地_______ 离开_______ 转变________ (阳光）照耀___________季节________ 亲爱的________ 报告__________ 温度_______度________ 之前________ 在外面________ 改变________雨伞_______ 完成______ 走路__________ 真实的______ 穿上________ 午餐时刻________ 猛烈地；努力地______ 你的；你们的______我的第一天________________ 一些有趣的东西________________ 很多衣服________________ 开始照耀________________ 在午餐时间________________ 下大雨________________ 在某一天________________二、重点语法Today is my first day in London and I learned something interesting about the weather here.1）At ,in 跟地点的差别：at+小地点in +大地点________ home ________ school ________ Guangzhou________ shop ________ England ________ China________museum ________ Beijing ________ the playground2)something interesting 一些有趣的东西something 跟形容词连用时，形容词要后置。

一些冷的东西_________________ 一些新的东西_________________一些可怕的东西_________________ 一些无聊的东西_________________ What’s the temperature?The weather report said the temperature was only 15℃.What’s the temperature? 这是问答气温的常用句型。

回答时，一般要用It’s + 数字+ 单位。

同时，我们也可以用How many degrees? 来询问温度。

根据实际情况回答问题。

What’s the temperature now?_____________________________________________What was the temperature yesterday?_____________________________________________What was the temperature the day before yesterday?_____________________________________________I put on lots of clothes before I went to my new school.1). before ……之前对应词：after ……之后晚饭前，你可以看一会儿电视。

_____________________________________________放学后，他通常跑步。

___________________________________________________2). put on 穿上Put on your coat. 穿上你的大衣。

注意：put on 强调穿上的动作，而wear 强调穿着的状态。

用put on ,wear 的正确形式填空1. Mr Wang, our English teacher, often a pair of dark glasses (墨镜).2. The boy a yellow T-shirt comes from America.3. your jacket, Lucy. It’s cold outside.4. the new skirt.I had no umbrella.There was no rain.There was / were no…可用来描述过去某处没有某人某物。

No后面可以直接加名词。

我们周末不用上学。

_____________________________________________天空没有云朵。

_____________________________________________我没有故事书。

_____________________________________________But when school finished at 3 p.m.注意表示时间的介词搭配：1. in和‘‘年、季节、月’’搭配；2. on和星期、日期以及‘‘有day的节日’’搭配；3. at 和‘‘点钟及没有day的节日’’搭配。

________10:00 a.m. ________ noon ________ Sunday________ night ________ Spring Festival ________October 12th________Sunday morning ________ autumn ________ the morning ________ the morning of Oct. 12th ________ October ________ 2014________ a cold morning ________ the afternoon ________ Mid-autumn DayI put on my coat and walked home.walk to +地点步行到某处，但当后面的地点是home，here, there时，介词to 省略。

步行回家_______________ 回家_______________来这边_______________ 去那边_______________Part Two 课堂练习一、用动词的正确形式填空1. Tom and Mary ___________ (come) to China last month.2. Mike _________________(not go) to bed until 12 o'clock last night. So he______ (get) up late.3. Mary __________ (read) English yesterday morning.4. Tom ___________ (begin) to learn Chinese last year.5. My mother ________________ (not do) housework yesterday.6. There ____________ a telephone call for you just now. (be)7. -When _______ you _________ (come) to china? -Last year.8. _________ (be) it cold in your city yesterday?9. How many people ________ (be) there in your class last term?10. There ________ (be) a football match on TV yesterday evening, but I _________ (have) no time to watch it.二、按照例子改句例：I had lunch at 12 o’clock yesterday.否定句：I didn’t have lunch at 12 o’clock yesterday.一般疑问句：Did you have lunch at 12 o’clock?肯定/否定回答：Yes, I did. No, I didn’t.对划线部分提问：What did you do at 12 o’clock yesterday.1. The children had a good time in the park.否定句：__________________________________________一般疑问句：________________________________________肯定/否定回答：____________________________________对划线部分提问：____________________________________2. There were about nine hundred people at the concert.否定句：__________________________________________一般疑问句：________________________________________肯定/否定回答：____________________________________3. Ann did her homework yesterday evening.否定句：__________________________________________一般疑问句：________________________________________对划线部分提问：____________________________________4. Last week I read an English book.否定句：__________________________________________一般疑问句：________________________________________ 肯定/否定回答：____________________________________对划线部分提问：____________________________________ 5. My brother was in the park just now.否定句：__________________________________________一般疑问句：________________________________________ 对划线部分提问：____________________________________ Part Three 课后练习一、按照中文并使用相应形式填空1. The __________(气温) falls below zero at night.2. Do you listen to the weather __________(报告) every day?3. It’s raining _______(猛烈地). I have no ________ (雨伞).4. We have a lot of __________(阳光) here in summer.5. It's __________（多云的）today.二、选择题。