最新人教版一下数学摆一摆想一想ppt课件课件PPT.ppt 27页

'人教版一下数学摆一摆想一想ppt课件 你们能用2个表示不同的数吗？个位十位2个位十位11个位十位20这样摆，不重复，不遗漏，很有序！ 你们能用2个表示不同的数吗？个位十位2个位十位11个位十位20表示的数211200+2=21+1=22+0=2这是2的组成！ 想一想，用10个圆片可以表示哪些不同的数？用11个呢？10个圆片可以表示19、28、37、46、55、64、73、82、91九个两位数。11个圆片可以表示29、38、47、56、65、74、83、92、八个两位数。 0123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899用1个摆用2个摆用3个摆用4个摆用5个摆用6个摆用7个摆用8个摆用9个摆奇妙的数用10个摆用11个摆用12个摆用13个摆用14个摆用15个摆用16个摆用17个摆用18个摆 奶奶今年的年龄可以用7个圆片来表示。你们猜：奶奶今年是多少岁？最大可能奶奶可能是52岁、61岁、70岁。最大是70岁。 老师今年的年龄正好也可以用7个圆片来表示。你们猜：老师今年的年龄可能是多少岁？老师今年的年龄，十位上的数比个位上的数少1，老师今年多少岁？老师可能是25岁、34岁、43岁。哈哈！老师今年是34岁。 高二英语Unit5Book5复合句中的省略 I.时间、条件、让步、方式状语从句中的省略在when,while,until,though/although,if,unless,once,asif/though,whenever等连接的状语从句中，当从句主语跟主句主语相同，可省略从句的_____和_______；当从句主语为it时，可省略___和_______。主语be动词itbe动词 Task1:请用括号标出下列句子中可省略的部分。1.Hefeelsemptywhileheisnotatthecomputer.2.Whenitistakenaccordingtothedirections,thedrughasnosideeffects.3.Heopenedhismouthsseveraltimesasifhewastosaysomething.4.AlthoughIaminvited,Iwon’tgothere.5.Wheneveryouareintrouble,turntomeforhelp.6.Ifitispossible,I’dliketogooutforawhile. Task2:请把下列句子中已省略部分还原。1.Lookoutforcarswhen____________crossingthestreet.2.Shetalkedwhile__________preparingtheirsupper.3.Helookedaroundasthough___________________waitingforsomeone.4.Though__________poorlyfurnished,theroomiscleanandtidy.5.Whenever_________known,suchfactsshouldbereported.6.If______necessary,I"llhavethelettercopied.youareshewashewas/wereitistheyareitis Task3:请用从句的省略形式翻译下列句子。1.一旦被发现，你将会被惩罚。____________,youwillbepunished.2.虽然遭遇困难，他并不向命运屈服。(expose)___________________todifficulties,hedidn’tsubmittothefate.3.她匆匆忙忙离开房间，似乎生气了。(angry)Shehurriedlylefttheroom__________.4.他会保持沉默，除非有人问他。____________,hewillkeepsilent.5.无论何时有可能，你应该练习说英语。__________________,youaresupposedtopracticespeakingEnglish.6.如果方便的话，我想去拜访您。_____________,I’dliketovisityou.OncefoundAlthoughexposedasifangryUnlessaskedWheneverpossibleIfconvenient Task4:请修改以下病句。WhenIwaswalkinginthestreet,oneofmyshoesgotstuckinahole.1.Whenwalkinginthestreet,oneofmyshoesgotstuckinahole.2.Musiccanrelaxusifstressed.Musiccanrelaxusifwearestressed.3.Ifnottakingseriously,thesituationwillgetworse.Ifnottakenseriously,thesituationwillgetworse.4.Iamusedtolisteningtomusicwhileworked.Iamusedtolisteningtomusicwhileworking. Task4:请修改以下病句。5.Thestickinthewaterlooksasifwerebroken.Thestickinthewaterlooksasifitwerebroken.Thestickinthewaterlooksasifbroken. Task4:请修改以下病句。6.Onceitpublished,thebookwillbeverypopular.Onceitispublished,thebookwillbeverypopular.Oncepublished,thebookwillbeverypopular. II.比较状语从句中的省略在than或as…as引导的从句中，一些成分在上下文清楚的情况下被省略。 Task5:翻译下列句子。1.Hehasmadegreaterprogressthan(hedid)before/ever.2.Hecamehomeearlierthan(hewas)expected.3.Sheworksashardasyoungpeople(do).他取得了比以前更大的进步。他来得比预计得早些。她工作和年轻人一样努力。 III.限制性定语从句中的省略在_______定语从句中，关系代词作____时，可省略关系代词。但是，关系代词前有____时，不能省略。限制性宾语介词 Task6:下列句子中，有些引导词可以省略，请用括号标出可以省略的引导词。1.HewhohasneverbeentotheGreatWallisnotatrueman.2.SheisthegirlwhoIwillneverforget.3.Ifdreamsdie,lifeisabroken-wingedbirdthatcanneverfly.4.MrSmith,whomIhavelearnedalotfrom,isafamousscientist.5.Sheiswillingtogiveeverythingthatshehastoyou.6.Shetookphotographsofthethingsinwhichshewasinterested.()() IV.宾语从句中的省略单个that引导的宾语从句中，引导词that可以省略。多个that引导的宾语从句中，只能省略______引导词that。第一个 Task7:下列句子中，有些引导词可以省略，请用括号标出可以省略的引导词。1.Hehastoldmethatwewillhavetwodaysoff.2.Thenewsisthatwewillhavetwodaysoff.3.Itisexcitingthatwewillhavetwodaysoff.4.Weareexcitedatthenewsthatwewillhavetwodaysoff.5.Hetoldmethathehadtwosonsandtheybothhadgonetocollege.()表语从句引导词不能省主语从句引导词不能省同位语从句引导词不能省that 1.Themanwefollowedsuddenlystoppedandlookedasif________(see)whetherhewasgoingintherightdirection.2.Tomraisedhishandasif_____(say)something.4.Hestaredatthegirlasif______(see)herforthefirsttime.5.Theplayerisrollingonthegroundasif____(hurt)badly.6.I’msureallwillgowellas________.(plan)toseetosayseeinghurtplanned 1.Theresearchissodesignedthatonce_______(begin)nothingcanbedonetochangeit.2.Theeighteen-storiedbuilding,when________(complete),willshutoutthesunlightinguptheroomsinmyhouse.3.IfyougotoBritain,you’llfindthestreetstherelessbeautifulthancommonly_______.(suppose)4.Whenfirst________(introduce)tothemarket,theseproductsenjoyedgreatsuccess.5.Itshamesmetosayit,butItoldaliewhen________(question)atthemeetingbymyboss.beguncompletedsupposedintroducedquestioned 6.Generallyspeaking,when________(take)accordingtothedirections,thedrughasnosideeffect.7.Unless________(invite)tospeak,youshouldremainsilentattheconference.8.Though________(lack)money,hisparentsmanagedtosendhimtouniversity.9.When_______(offer)help,oneoftensays“thankyou."or“Itiskindofyou”.10.If______(give)moreattention,theboycouldhaveturnedoutbetter.takeninvitedlackingofferedgiven'