一般给学生们上课之前,老师就早早地准备好了教案课件,到写教案课件的时候了。我们制定教案课件工作计划,才能更好地安排接下来的工作!你们清楚教案课件的范文有哪些呢?下面是小编精心为您整理的“中考数学专题复习:数学的方程思想”,仅供参考,欢迎大家阅读。
中考数学专题复习之四:数学的方程思想
在解决数学问题时,有一种从未知转化为已知的手段就是通过设元,寻找已知与未知之间的等量关系,构造方程或方程组,然后求解方程完成未知向已知的转化,这种解决问题的思想称为方程思想。
【范例讲析】:
例1:已知:如图,正方形ABCD的边长为a,△PQA是其内接等边三角形。
求:PB的长。
例2:如图,在△ABC中,∠B=30°,∠ACB=120°,D是BC上一点,且∠ADC=45°,若CD=8,求BD的长。
【闯关夺冠】
1:如图,EB是直径,O是圆心,CB、CD切半圆于B、D、CD交BE延长线于A点,若BC=6,AD=2AE,求半圆的面积。
2.如图,某农场要用总长24m的木栏建一个长方形的养鸡场,鸡场的一边靠墙(墙长12m),且中间隔有一道木栏,设鸡场的宽AB为xm,面积为Sm2;
(1)求S关于x的函数关系式;
(2)若鸡场的面积为45m2,试求出鸡场的宽AB的长;
(3)鸡场的面积能否达到50m2?若能,请给出设计方案;若不能,请说明理由.
老师在新授课程时,一般会准备教案课件,大家在用心的考虑自己的教案课件。写好教案课件工作计划,才能使接下来的工作更加有序!你们清楚有哪些教案课件范文呢?下面是小编为大家整理的“中考复习专题函数思想与数形结合专题复习教案”,希望能为您提供更多的参考。
中考复习专题(四)函数思想与数形结合一般过去时复习课学案
LearningGoals
学习目标
1.复习巩固动词过去式的构成和一般过去时态的各种句式结构;
2.能用一般过去时态谈论发生在过去的事情。
Thefirstround
第一关
Tryto
remember
thepastforms.
边听边记
过去式
你记住下列动词的过去式了吗?
calltalklaughdreamsmilesteptry
am/isareseetake
sayhavefeel
knowhold
规则动词的过去式构成规律:
(1)
(2)
(3)
(4)
Thesecondround
第二关
Makingsentences.
造句大比拼
例句:
Forexample:lastSunday,Jim,playsoccer,happy
(1)LastSundayJimplayedsoccer.Hewashappy.
(2)LastSundayJimdidn’tplaysoccer.Hewasn’thappy.
仿照例句造句:
1.lastweek,Mary,rideahorse,interesting
(1)Mary_________________lastweek.It___________.
(2)Mary________________lastweek.It____________.
2.yesterday,mybrother,feedchickens,fun
(1)Yesterdaymybrother___________________.It___________.
(2)Yesterdaymybrother________________________.
It________________.
3.lastweekendMike’sfamily,climbthemountain,tired
(1)Lastweekend_________________________________.
They____________________.
(2)Lastweekend______________________________.
They_________________________.
一般过去时句式规则:
一般过去时的肯定句中谓语动词要使用_____________.
变否定句时:(1)句中含有动词be(_____/_____),be后加_______;(2)句中含有实义动词,动词前要加_______.谓语动词变为____
________.
Thethird
round
第三关
Guessing
小小占卜师
看图猜一猜:
一般过去时句式规则:
变一般疑问句时:(1)句中含有动词be(_____/_____),变疑问,__________;(2)句中含有实义动词,要在句首加____,谓语动词要变为___.(注意:Iwas变______________)
Thefourth
round
第四关
Conversation
完成对话
读对话,写问题:
Jim:Hi,Bill.______________________________?
Bill:Myschooltripwasgreat.
Jim:____________________________?
Bill:Wewenttothepark.
Jim:_____________________________?
Bill:Wewenttherebybike.Wealllikeridingbikes.
Jim:________________________yesterday?
Bill:Itwassunnyandwarm.Ilikethecleanairandsunshineinthepark.
Jim:__________________________?
Bill:Wesanganddancedandwealsoplayedsomegamesthere.
Wehadalotfun.
一般过去时句式规则:
特殊疑问句:_____________+_______________?
Thefifthround
第五关
Waitingroom.
候诊室
圈出错误并改正。
1.ItisSundayyesterday.
2.UncleWilsonwaswenttoShanghailastMonday.
3.Didyouhadnoodleslastnight?
4.Thegirlswasborninabigcityin1987.
5.Theystopedtalkingwhentheteachercamein.
6.Hedidn’twentoutlastFriday.
7.Wherehewentlastnight?
Thesixth
round
第六关
Readingandwriting.
完成短文
看图填空:
LastFriday,itwassunnyandhot.Luffyhadatriponthefarm.Luffy______manyflowers.Theflowers______verybeautiful.Luffy______ahorse.It_____veryinteresting.He______acow.Itwasveryexciting.Thenhe______somechickens.IntheafternoonLuffy
______fishingwithhisfriend.Afterthathe________abigdinner.Luffyalso______manyphotos.Luffy_____agoodtimeonthefarm.
一、用所给词的正确形式填空:
1.He________TVfortwohoursyesterday.(watch)
2.She______forherfriendsatthebusstopnow.(wait)
3.Hisuncleusually_________toworkbybus.(go)
4.LinTaoandhisclassmates______onafarmlastweek.(work)
5.There_______nohospitalsheretenyearsago.(be)
6.Ialways______upatsixinthemorning,butI_____upalittlelateryesterday.(get)
7.She_______swimverywellwhenshewasfiveyearsold.(can)
8.They________EnglishinBeijingin1990.(teach)
9.Healways_______toworkbybikewhenhewasinShanghai.(go)
10.I______toschoolyesterdaybecauseI_____ill.(notgo,be)
二、按要求变换句型:
1.Fatherboughtmeanewbike.(否定句)
Father_____________anewbikeforme.
2.Franktaughtmealotaboutrobots.(一般疑问句)
_______Frank_______youalotaboutrobots?
3.ThomasspentRMB10onthisbook.(否定句)
________________________Thomas_______onthisbook.
4.Myfamilywenttothebeachlastweek.(划线提问)
________________________family_______lastweek?
5.SallyoftenreadsEnglishinthemorning.(用yesterdayevening改写)
Sally_____________yesterdayevening.
三.阅读理解:
Lastmonth,Mr.BeanhadagreattripinParis(巴黎).Hegottherebytrain.Onthefirstday,hespenttimeonthebeachandplayedwithwater.Hewasreallyhappy.Intheevening,hewatchedamovieinthecinema.Onthesecondday,hewentshopping.Heboughtsomeclothesandapairofshoes.Afterthat,hedancedonthestreet.Onthethirdday,herodeabikewithmanypeople.Thenhewasveryhungryandhadabigdinnerintherestaurant.
Allinall,histripwasgreatfun.Andhetooklotsofgreatphotos.
Answerthequestions:根据短文回答问题。
1.WhendidMr.BeangotoParis?
2.Didhegotothebeach?
3.Whatdidshebuy?
4.Howwashistrip?
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