人教版小学二年级数学下册知识点预习第一单元 数据整理与收集1.学会用正字记录数据。2.会数正,知道一个正字代表数量5。3.根据统计表,会解决问题。例:气象小组把6月份的天气作了如下记录:(1) 把晴天、雨天、阴天的天数分别填在下面的统计表中。天气名称晴天雨天阴天天数(2) 从上表中可以看出:这个月中( )的天数最多,( )的天数最少。(3) 这个月中阴天有( )天。(4) 这个月中晴天比雨天多( )天。(5) 这个月中阴天比雨天多( )天。(6) 你还能提出什么问题?第二单元 表内除法(一)1.平均分的含义:每份分得同样的多,叫做平均分。除法就是用来解决平均分问题的。2.平均分里有两种情况:(1)把一些东西平均分成几份,求每份是多少;用除法计算,总数÷份数=每份数例:24本练习本,平均分给6人,每人分多少本?列式:(2)包含除(求一个数里面有几个几)把一个数量按每份是多少分成一份,求能平均分成几份;用除法计算,总数÷每份数=份数例:24本练习本,每人4本, 能分给多少人?列式:3、除法算式的读法:从左到右的顺序读,÷读作以,=读作等于,其他数字不变。4、除法算式各部分名称:被除数÷除数=商。例:42÷7=6 42是(被除数),7是( ),6是( );这个算式读作( )。5.一句口诀可以写四个算式。(乘数相同的除外)。例:用三八二十四这句口诀解决的算式是( )A、24÷6= B、4×6=C、24÷3= D、24÷4=6、用乘法口诀求商,想:除数×商=被除数。第三单元 图形的运动1、轴对称图形:沿一条直线对折,两边完全重合。对折后能够完全重合的图形是轴对称图形,折痕所在的直线叫对称轴。成轴对称图形的汉字:一,二,三,四,六,八,十,大,干,丰,土,士,中,田,由,甲,申,口,日,曰,木,目,森,谷,林,画,伞,王,人,非,菲,天,典,奠,旱,春,亩,目,山,单,杀,美,春,品,工,天,网,回,喜,莫,罪,夫,黑,里,亚。2、平移:当物体水平方向或竖直方向运动,并且物体的方向不发生改变,这种运动是平移。只有形状、大小、方向完全相同的图形通过平移才能互相重合。3、旋转:物体绕着某一点或轴进行圆周运动的现象就是旋转。(一)填空1、汽车在笔直的公路上行驶,车身的运动是( )现象2、长方形有( )条对称轴,正方形有( )条对称轴。3、小明向前走了3米,是( )现象。4、如果一个图形沿着一条直线对折,两侧的图形能够完全重合,这样的图形叫做( )图形,这条直线就是( )(二)判断1、圆有无数条对称轴。 ( )2、张叔叔在笔直的公路上开车,方向盘的运动是旋转现象。 ( )3、所有的三角形都是轴对称图形。 ( )4、火箭升空,是旋转现象。 ( )5、树上的水果掉在地上,是平移现象 ( )(三)选择1、教室门的打开和关闭,门的运动是( )现象。A.平移 B旋转 C平移和旋转2、下面( )的运动是平移。A、旋转的呼啦圈 B、电风扇扇叶 C、拨算珠第四单元 表内除法二这单元主要是考口算题。有以下几种形式:1、用7、8、9的乘法口诀求商求商方法:想除数×( )=被除数,再根据乘法口诀计算得商。例.直接口算:28÷4 8÷82、解决问题求一个数里有几个几,和把一个数平均分成几份,求每份是多少,都用除法计算。例.填空:45÷9=5 表示把()平均分成()份,每份是();还表示( )里有()个();第五单元 混合运算1、同级运算:(连加,连减,连乘,连除,加减混合,乘除混合)在没有括号的算式里,只有加、减或只有乘、除法按照从左向右的顺序,依次计算。同级运算的类型:+ +,- -,+ -,- +× ×,÷ ÷,× ÷,÷ ×例:23+6+18 97-34-2832+11-8 53-24+382× 3 ×8 81÷9 ÷32× 8÷4 72÷ 8×42、非同级运算:(乘加,乘减,除加,除减)在没有括号的算式里,如果有乘、除法,又有加、减法,要先算乘、除法,再算加、减法。不同级运算的类型:× + , × -, + ×, - ×÷ + , ÷ -, + ÷, - ÷例:5× 6 +14 3× 7-163 + 5 ×9 45- 9×345÷9+14 64÷ 8-813 + 56÷7 64- 40 ÷83、带小括号运算的类型:×( + ), ×(-),( + )÷, (- )÷。算式里有括号的,要先算括号里面的。例:6×(7 + 2) (24-18)×9( 14+35 )÷7 (82-18 )÷84.把两个算式合并成一个综合算式。(重点)。先看分步算式的第二步算式,再看其中第一个数和第二个数哪个数是前一步算式的结果,就用前一步算式替换掉那个数,其他的照写。当需要替换的是第二个数,必要时还需要加上小括号。例:6×7=42
上传时间:2023-05-23 页数:8
505人已阅读
(5星级)
名家精选英语绘本A Little Golden Book D021 - Walt Disney's Grandpa Bunny (1951) (goldengems).pdf
上传时间:2024-02-03 页数:16
504人已阅读
(5星级)
一、好词积累二、好句摘录1.浮云游子意,落日故人情。 ——李白《送友人》 2.真正的管理人是去管理人的情绪。——顾修全3.感情有着极大的鼓舞力量,因此,它是一切道德行为的重要前提。 ——凯洛夫欣慰气馁呆滞百感交集师老兵疲 落魄陶醉畅快败兴而归大喜过望【字词解释】日期:2022.8.18主题:心情摘抄时间: 15分钟1.气馁(něi):指失去信心与勇气,提不起精神再做任何事。2.呆滞(zhì):呆是不灵敏,目瞪口呆;滞是不通,呆痴、不灵敏,不流通。3.落魄:失去魂魄。形容非常惊慌;潦倒失意;豪迈,不拘束。4.百感交集:感:感想。集:聚拢,会合。交集:指不同的感情同时发生。形容许多感情交织在一起。5.师老兵疲:师、兵:军队。老:衰竭。疲:疲怠,累乏。指用兵时间太长,兵士劳累,士气低落。一、好词积累二、好句摘录1.一代倾城逐浪花,吴宫空自忆儿家。 ——曹雪芹《五美吟·西施》2.北方有佳人,绝世而独立。一顾倾人城,再顾倾人国。 ——李延年3.有些人在外貌乍一看并不使人感到愉快,但等你的眼睛能够从他们不端正的五官上窥见一颗饱经沧桑的崇高心灵时,你就会他们了。 ——莱蒙托夫傲慢腼腆憨厚明眸皓齿美如冠玉妩媚靓丽邋遢獐头鼠目臼头深目【字词解释】日期:2022.8.19主题:容貌摘抄时间: 15分钟1. 妩媚:形容女子姿容美好、可爱、妖娆多姿,举止神态具有极度的美丽和吸引力。2. 靓丽:指靓艳美丽,常用来形容青春貌美的女子。3. 美如冠(guān)玉:原比喻只是外表好看。后形容男子长相漂亮。4. 獐头鼠目:脑袋像獐子那样又小又尖,眼睛像老鼠那样又小又圆。形容人相貌丑陋,神情狡猾。5. 臼头深目:头顶凹入,两眼深陷。形容人的面貌极为丑陋。一、好词积累二、好句摘录1.倾国倾城恨有馀,几多红泪泣姑苏,倚风凝睇雪肌肤。——薛昭蕴《浣溪沙·倾国倾城恨有馀》2.红酥手,黄縢酒,满城春色宫墙柳。——陆游《钗头凤·红酥手》3.一枝红艳露凝香,云雨巫山枉断肠。——李白《清平调·其二》白皙黎黑水嫩 肤如凝脂冰肌玉肤暗涩坑洼滑泽 黄皮寡瘦领如蝤蛴【字词解释】日期:2022.8.20主题:皮肤摘抄时间: 15分钟1.黎黑:形容人的脸色(肤色)黝黑。2.坑洼:形容皮肤表面凹凸不平,高高低低。3.肤如凝脂:皮肤像凝固的油脂。形容皮肤洁白且细嫩。4.黄皮寡(guǎ)瘦:形容面黄肌瘦的样子。5.领如蝤(qiú)蛴( qí):脖颈似蝤蛴般白净修长。蝤蛴:天牛的幼虫,色白身长。形容脖子的丰润白皙。一、好词积累二、好句摘录1.首夏犹清和,芳草亦未歇。——谢灵运《游赤石进帆海》2.连雨不知春去,一晴方觉夏深。——范成大《喜晴》3.晴日暖风生麦气,绿阴幽草胜时。——王安石《初夏即事》热浪酷暑 盛夏流金砾石椅席炙手孟夏炎炎 夏令吴牛喘月槁苏暍醒【字词解释】日期:2022.8.21主题:夏摘抄时间: 15分钟1.孟夏:夏季的第一个月。2.炎炎:形容夏天阳光强烈,极热。3.流金砾(lì)石:指能使金石熔化,形容天气炎热。4.吴牛喘月:原义是吴地水牛见月疑是日,因惧怕酷热而不断喘气;比喻见到曾受其害的类似事物而过分害怕惊惧,或形容天气酷热。5.槁(gǎo)苏暍醒:使中暑者苏醒。形容苦难者得救,重获生机。一、
上传时间:2023-05-23 页数:7
504人已阅读
(5星级)
504人已阅读
(5星级)
Star Wars - The Empire Strikes Back (1997 Golden Book) (Brainiac-Darwin).pdf
上传时间:2024-03-31 页数:24
503人已阅读
(5星级)
503人已阅读
(5星级)
小马宝莉绘本my little pony - very lucky ponies.pdf
上传时间:2024-02-09 页数:14
503人已阅读
(5星级)
小兔麦克斯和露比Max and Ruby-Baby Max - Clean-Up Time!.pdf
上传时间:2024-02-09 页数:12
503人已阅读
(5星级)
Arthur的An Arthur advanture系列Part 4—Artuhu__s_underwear.pdf
上传时间:2024-02-08 页数:36
503人已阅读
(5星级)
1S2-032Narrator: Peppa and her friends are going to playgroup today. e children each have theirown hook to hang their coats on.Gazelle: Today, we have a new pupil, Emily Elephant.Pupils: Hello, Emily!Emily: Hello.Narrator: Emily is a bit shy.Gazelle: Who would like to show Emilywhere to hang her coat?3Pupils: Me! Me! Me! Me!.Gazelle: We just need one. Peppa, can you show Emily where to hang her coat?George: Yes, Madame Gazelle. We each have our own coat hooks. is one is for you, Emily.Narrator: Emily is hanging her coat on her very own coat hook.Gazelle:Now, Emily, what would you like to do today? Painting, clay or building-blocks?4Emily: Um. I don't know. Maybe building-blocks.Gazelle: And everyone else; painting, clay or building-blocks?Pupils: Building-Blocks!!!Gazelle: My goodness! Building-blocks are popular today!Narrator: Everyone wants to sit next to Emily Elephant.5Peppa: Emily, you put one block on top of another. Like this.Danny: It's better if you put them side-by-side.Suzy: No, this way, Emily.Candy: is is the right way, Emily.Pedro: No, Emily! Like this.Gazelle: You're all being very helpful. But Emily, how would you play with the blocks?6Emily: Um. I'm not very sure. I might do it like this.7Pupils: Wow!Narrator: Emily Elephant is good at building-blocks.It is playtime.Pupils:Horray!8Gazelle: Emily, would you like to playoutside with the others?Emily: Yes, please.Gazelle: Can someone show Emily where we play?Peppa: Yes, Madame Gazelle.Narrator: At playtime, Peppa and her friends play in the school garden.9Pupils: Can't catch me!Narrator: What a lot of noise!Peppa: Let's see who is the loudest!Rebecca: Ok. I'll go rst. Squeak! Squeak!Narrator: at was quite loud. Now, it is Zoe Zebra's turn. Now Suzy Sheep. Now Danny Dog. at was very loud. Candy: My turn! Meow! Pedro: My turn! Whinnee!Peppa: My turn! SNOOORT!!!!!10Narrator: Peppa is the loudest. Rebecca: Emily, you try!11Emily: I'm not too sure.Pupils: Please, Emily!Emily: Ok, I'll try.AOO
上传时间:2024-02-06 页数:16
503人已阅读
(5星级)
503人已阅读
(5星级)
503人已阅读
(5星级)
503人已阅读
(5星级)
牛津阅读树的glow-worms_poetry系列2-5Minibeast_Poems.pdf
上传时间:2024-02-11 页数:20
502人已阅读
(5星级)
Pearson 0-6岁低幼读物K_OLR_1.2 Cat and Dog Work Together.pdf
上传时间:2024-02-06 页数:6
502人已阅读
(5星级)
1S2-072Narrator: Peppa and George are going to the seaside with Granny and Grandpa Pig. Peppa and George love the seaside.Peppa: Oh,where has the sand gone?Granny: There isn't any sand down this beach, Peppa.Peppa: No sand? But we wanted to make sand castles.3Narrator: Peppa and George love making sand castles.Granny: No, no, George. Don't be upset!ere are lots of exciting things to do on this rocky beach.Peppa: Like what?4Grandpa: When the sea goes out, it leaves little pools of water in amongst the rocks.Granny: at called rock pools.Grandpa: And in these rock pools, there's something special that the sea has left behind.5Peppa: I can see something glittering. It's a coin.Grandpa: Maybe it's a pirate's treasure.Granny: Let's make a collection of all the things we nd.Peppa: Yes,we'll put them in George's bucket.6Grandpa: What surprise is waiting in this pool?Peppa: ere's nothing special in this one.Grandpa: ere's always something, Peppa.Look closer!Peppa: Whoa, there is something.7Grandpa: Yes, it's a crab!Narrator: e crab is pinching Grandpa Pig's nger.Grandpa: Ouch!Peppa: Naughty Mr. Crab8Peppa: Look, George. Mr. Crab is walking side ways.Narrator: George is pretending to be a crab.Peppa wants to be a crab, too.9Peppa: We're naughty crabs.Pinch, pinch, pinch!Grandpa: There are two naught crabs trying to pinch me.George: Pinch, pinch, pinch!Peppa: We're naughty crabs.Pinch, pinch, pinch!Grandpa: Shoo,shoo,shoo,you naughty crabs.Go back to your little rock pools.Peppa: Yes,let's look in more rock pools.10Grandpa: What can you see?Peppa: A seashell.Granny: Can you hear the sea in it?Peppa: What do you mean?Granny: If you put a shell to your ear,you could hear the sea.11Peppa: Wow,I can hear the sea! I love my seashell.Granny: George,can you nd a seashell,too?12George: Shell!Peppa: at's not a shell.George: Oh.Grandpa: Peppa's right, That's not a shell.George has found a fossil.13Peppa: What's a fossil?Grandpa: A fossil is the remains of an animal that lived l
上传时间:2024-02-06 页数:16
502人已阅读
(5星级)
1S1-042Narrator: Peppa and her family are visiting Granny Pig and Grandpa Pig.Peppa: Granny Pig! Grandpa Pig!George : Ganggy lg!Baba lg!3Granny Pig: Hello, my little ones. Come inside, we have a surprise.Peppa:What is it?Granny Pig : We have a new pet.Can you guess what it is?George :Dine-saw?Grandpa Pig : No.It's not a dinosaur.Come and see.4Narrator: Granny Pig and Grandpa Pig have a pet parrot.Granny Pig : Peppa, George, this is our pet parrot. She's called Polly. Pretty Polly.Polly : Pretty Polly.Peppa:Oooh. WoW.5Granny Pig : l'm a clever parrot.Polly : l'm a clever parrot.6Peppa:Mummy, Why does Polly copy everything that Granny says?Mummy : That's What parrots do. I'll show you. Hello, Polly.Polly : Hello, Polly.7Mummy : What a sweet little parrot!Polly : What a sweet little parrot!8Grandpa Pig : Come on, everyone, teatime! Peppa, George. Come on! There's chocolate cake!Peppa:Coming, Granny!9Narrator: Peppa and George love eating chocolate cake. But today, they are in a hurry to get back and play with Polly Parrot.Peppa: Finished!Grandpa Pig : What noisy little ones you are!Peppa:Granny, please, can we leave the table and go and see Polly Parrot?Grandpa Pig : Are sure you've completely nished your cake? O you go, then.10Peppa:Hurray!George, say something to Polly.Narrator: George is a little bit shy.George :Hello.Polly : Hello.11Narrator: Peppa and George are really enjoying playing with Polly Parrot.Peppa:I'm Peppa Pig!Polly : I'm Peppa Pig!12Peppa:George, say something.Narrator: Peppa and George are pretending to be parrots.Peppa:I'm Polly Parrot.13Narrator:Peppa is thinking of something else to say to Polly Parrot.Peppa:I'm a noisy parrot!Polly : I'm a noisy parrot!14Grandpa Pig : Peppa, George, have you been playing with Polly?Peppa:Yes, Granny.Grandpa Pig : Polly is such a sweet parrot.Peppa:Yes, Granny.15Grandpa Pig : I'm a clever parrot.Polly : I'm a noisy parrot!I'm a noisy parrot!Grandpa Pig : Ohh!Granny
上传时间:2024-02-06 页数:16
502人已阅读
(5星级)
1S1-062Narrator: Peppa and George are going to the playgroup.It is George's rst day.Daddy:George, are you looking forward to the playgroup?Peppa:Daddy, maybe George is too small to go to my playgroup?Daddy:He'll be ne, Peppa.ere'll be you andMr. Dinosaur there to keep him company. George:Grrr! Dine-Saw!Peppa:But I want to play with the big children! Not George and his toy dinosaur.3Narrator: Oh dear, Peppa doesn't wantGeorge to go to her playgroup.Daddy:We're here!Peppa:Daddy, are you sure George is big enough?Daddy:He'll be ne.Peppa:Alright, he can come.Daddy:Bye-bye!4Narrator: Madame Gazelle looks after the children at the playgroup.Peppa:Hello! is is my little brother, George.Madame Gazelle :Hello, George!5Suzy :Baa! I wish I had a little brother like George.Peppa:Really?6Danny Dog:Hello! I'm Danny Dog.Woof Woof! Is that a dinosaur?Peppa:It's just a toy dinosaur.George:Grrr! Dine-Saw!Danny :Brilliant! Woof Woof!George:Dine-Saw! Grrr!Candy,Suzy and Rebecca :Aaaaaggghh!7George:Dine-Saw! Grrr!Madame Gazelle :Aaaah, really scary.Danny :at's brilliant!8Peppa:George is my brother.He's brilliant.Narrator:Peppa is proud of her little brother, George.9Madame Gazelle :Shall we show George how we paint pictures?Peppa:George is not very good at painting.Madame Gazelle :Well, maybe you could help him?Peppa:Yes, I'm very good!I will show him how to paint a ower.10Peppa: George, today I'm going to teach you how to paint a ower. Peppa:First, you paint a big circle.Peppa:No, George, that's the wrong color!11Peppa: Now you paint the ower's petals.Peppa:George!at's the wrong shape!12Peppa: Now you paint the stalk and the leaves. Perfect!Peppa: George, you've done it all wrong!13Madame Gazelle:Now what do we have here?Peppa:I've painted a ower.Madame Gazelle:That's very good, Peppa.And George has painted a dinosaur.George:Grrr Dine-Saw!Danny :Woof! Brilliant!14Madame Gazelle:I think George and Peppa's pictures should go on the wall.Everyone:Hurray!Madame Gazelle:Pe
上传时间:2024-02-06 页数:16
502人已阅读
(5星级)
Two Crazy Pigs 两只小猪顽皮记We are two crazy pigs.We lived on the Fenster farm.We tickled the hens while they were laying eggs.Stop that, you crazy pigs, yelled Mr. Fenster.We tied the cows tails together while they were giving milk.Stop that, you crazy pigs, yelled Mr. Fenster.Instead of rolling in the mud, we threw it at each other.Stop that, you crazy pigs, yelled Mr. and Mrs. Fenster.OOPS!Pack your bags and leave! yelled Mr. and Mrs. Fenster.All the animals cried, Well miss you, crazy pigs!We went down the road to Mr. and Mrs. Henhawks farm.Do you have room here for two crazy pigs? we asked.Mr. Henhawk made us a new pigpen.He laughted when we dipped the sheeps tail in ink.Mrs. Henhawk let us make mud pies in her stove.One day the Fensters cow, Shirley, came to visit.Will you come back to the farm? Shirley asked.The hens are not laying eggs. The cows have stopped giving milk.No, we said. Mr. and Mrs. Henhawk love us for who we are – crazy pigs.We pulled Shirleys tail and said good-bye. Then she went back to the Fenster farm.One week later, all of the Fensters animals came to the Henlawk farm.Shirley spoke.The Fensters have moved to the city. Do you have room for us her?Mr. and Mrs. Henhawk asked all the animals to live on their farm.We were very happy to have our friends back.We rubbed everybodys faces in muc.We jumped on the Hwehawks feather bed for two hours.We were so happy!Lets visit the Fensters in the city for old times sake, we said.Are you kidding? asked Shirley.Are you kidding? asked Mr. Henhawk.No, we said, were crazy!the end.
上传时间:2024-02-06 页数:1
502人已阅读
(5星级)
502人已阅读
(5星级)
客服
客服QQ:
2505027264
客服电话:
18182295159(不支持接听,可加微信)
微信小程序
微信公众号
回到顶部