1、浙教版七年级数学上册分层训练23 有理数的乘法第1课时2.3有理数的乘法(第1课时)1有理数的乘法法则：(1)两数相乘，同号得_，异号得_，并把绝对值_(2)任何数与零相乘，积为_2若两个有理数的乘积为1，就称这两个有理数互为_A组基础训练1下列运算错误的是()A(3)(4)12B()(6)2C0(3)(2)6D(2)(3)4242下列4个算式中，积为负数的算式的个数有()(3)() (6)|2|(3)0(2) 52A1个 B2个 C3个 D4个3在2，3，4，5这四个数中，任取两个数相乘，所得的积最大的是()A20 B20 C12 D104下列说法不正确的是()A没有倒数的数是0B倒数等于它
2、本身的数只有1C相反数等于它本身的数是0D绝对值最小的数是057个有理数相乘的积是负数，那么其中负因数的个数最多有()A2种可能 B3种可能 C4种可能 D5种可能6比较大小(用”、”或”连接)：(1)(4.2)(3)_0；(2)(2014)0_0；(3)(3)_10；(4)(3)_3.7直接给出下列各式的结果：(1)(3)(6)_；(2)(9)(8)_；(3)(5)(20)_；(4)20160_；(5)1()_.8(1)已知一个数的倒数等于它本身，则这个数为_；(2)绝对值小于2017的所有整数的积为_；(3)如果a与b互为相反数，x与y互为倒数，那么(ab)xy的值是_；(4)有理数a，b
3、，c满足abc0，且abc0，则在a，b，c中，正数有_个9计算：(1)()； (2)()()； (3)1()； (4)(0.3)()10把图中左边方框中的每一个数分别乘5，将结果写在右边框内相应的位置第10题图11计算：(1)2(5)(4)； (2)(5)()3(2)； (3)(2011)0.12把15表示成两个整数的积，有多少种可能性？把它们全部写出来 B组自主提高13两个有理数的和为正数，积为负数，则这两个有理数是()A两个正数B两个负数C一正一负且正数的绝对值较大D一正一负且负数的绝对值较大14(1)若规定一种新运算如下：a1b2a2b1，则_；(2)用”*”和”定义新运算：对于任意有
4、理数a，b，都有a*ba，abb.例如，4*34，355.则(2017*2016)*(20152014)的值是_15王叔叔家的装修工程接近尾声，油漆工程已结束经统计，油漆工共做40工时，用了150L油漆已知每升油漆128元，可以粉刷120m2，在结算工钱时，有以下几种结算方案：按工时算，每5工时600元；按油漆费用来算，油漆费用的25%为工钱；按粉刷面积来算，每6m2 232元请你帮王叔叔算一下，用哪种方案最省钱？C组综合运用16将2017减去它的，再减去余下的，再减去余下的依此类推，直至减去余下的，求最后的数是_参考答案23有理数的乘法(第1课时)【课堂笔记】1(1)正负相乘(2)零2.倒数
5、【分层训练】1C2.A3.C4.B5C【解析】积为负数，负因数的个数为奇数，可能有1个、3个、5个、7个，共4种可能，故选C.6(1)(2)(3)(4)7(1)18(2)72(3)100(4)0(5)18(1)1(2)0(3)1(4)29(1)(2)(3)(4) 1017142227.511(1)40(2)10(3)0124种1(15)(1)153(5)(3)513C14(1)17(2)201715按工时结算的工资为：6004800(元)按油漆费用结算的工资为：15012825%4800(元)按粉刷面积结算的工资为：2324640(元)第三种方案最省钱161【解析】根据题意，得2017(1)2
6、0171.Module 1 HobbiesUnit 1 Whats your hobby?一、兴趣爱好的词组：1.play computer games玩电脑游戏 2.play music玩音乐 3. collect stamps 集邮4.keep pets养宠物 5.make model ships做轮船模型 6. read books读书7.take photos 照相8.make cakes做蛋糕9. plant trees种树 10. grow flowers种花 11.listen to music听音乐 12. singing,唱歌 13.dancing跳舞14.drawing画画
7、15. play the piano弹钢琴 16.play chess下棋 17. play basketball 打篮球2、课文短语：1.make model ships 做轮船模型 2.love making 喜欢制作 3.more than 20 ships 超过20艘轮船 4.collect stamps 集邮 5.keep pets 养宠物 6. Three birds 三只鸟7.play music 玩音乐8. every day 每天 9.read books 读书 10. every night 每天晚上11.play computer games 玩电脑游戏 12.about
8、 50 games 大约50个游戏13.take photos 照相 14.during my holiday 在我的假期里三、句型:1. Whats your hobby?2. Do you like? Yes, I do. / No, I dont.3. I love/like I like/love dancing .4. I enjoy I enjoy listening to music.5. My (favourite) hobby is 6. is my (favourite) hobby.7. Is your hobby keeping pets? Yes, its. / No
9、, it isnt.Unit 2 His hobby is drawing1、课文短语：1.a great painter 一个伟大的画家 2.draw cartoons 画漫画3.coloured pencils 彩色的铅笔 4.his pet dog 他的宠物狗5.in the sky 在天空中 6.birthday cards 生日卡片 7.for his friends 给他的朋友们8.on their birthday 在他们的生日 9.interesting people 有趣的人物10.beautiful places 美丽的风景 11.in every room 在每一个房间1
10、2.in her house 在她的房子里13.二、句型：14.1. Whats Mikes hobby? His hobby is 15.2. When does Mike usually draw? Mike通常在什么时候画画？ He usually draws .16.3. What does Mike give his friends for their birthday?17.4. What present does Amy give to Tom?18.5. What does she want to do when she grows up? She wants to be a
11、writer.19.三、重点精析：20.1. grow up 成长，长大 want to do 想要做21.如：When Lucy grows up she wants to be an English teacher.22. 当露丝长大后，她想成为一名英语教师。23.当我长大后我想成为一个画家。 _24.2. very much 非常，很，十分25.如：Mr. Wu can play the piano very much. 吴先生很会弹钢琴。26.Janent很喜欢收集邮票。 _27.Module 2 Abilities28.Unit 3 I can swim very fast1、课文短
12、语：1.be good at drawing 擅长画画 2.draws very well 画得很好 3.read fast 读得快 4.jump high 跳得高5.jump far 跳得远 6.run fast 跑得快 7.sing well 唱得好 8.dance well （舞）跳得好2、句型：3、1. I can swim very fast.4、2. What can you do?你能够做什么？ I can5、3. Can he run fast? Yes, he can. No, he cant.6、4. Im good at drawing.7、5. What are you
13、 good at? 你擅长做什么？8、三、重点精析：9、1. be good at sth / doing sth 擅长某事，擅长做某事10、他擅长画画。He is good at drawing .11、2. lets = let us12、let sb do sth 让某人做某事13、如：Lets go swimming together. 让我们一起去游泳吧。14、3. help sb do sth 帮助某人做某事15、如：Who can help children learn? 谁能帮助学生学习呢？16、4. for 为了17、Unit 4 Can you do my homework
14、?1、课文短语：1.happy birthday 生日快乐 2.be here to help you 在这里帮助你 3.talking robot 会说话的机器人 4.speak English 说英语5.be good at many things 擅长很多东西 6.clean very well 扫得很干净 7.write Chinese and English 写汉字和英文2、句型：1、Can you do my homework?你会做我的家庭作业吗？ Yes, I can. No, I cant.2、2、Who gives Jiamin a present?3、3、What wil
15、l he do? He will become a clown.4、4、Who can help me?5、三、重点精析：6、1、speak + 某种语言7、如： Can you speak Chinese?8、2、do ones homework 做家庭作业3、talk with sb 与某人聊天 talk about 谈论某事Module 3 Daily lifeUnit 5 Where is Ben?一、课文短语：1.wants to talk with him 想和他谈话 2.at the swimming pool 在游泳池里 3.go swimming 去游泳 4.on weekd
16、ays 在工作日5.at the library 在图书馆 6.find him 找到他 7.look for him 寻找他 8.in the music room 在音乐室 9.take exercise参加锻炼10.in the gym 在体育馆 11.do ones homework 做家庭作业 12.in the classroom 在教室里 13.eat ice cream 吃冰淇淋14.at the school shop 在学校商店里2、句型：3、1. Where is Ben? He is at the swimming pool.4、2. I often play foot
17、ball after school.5、3. He likes skating.6、4. Does Ben often go swimming? Yes, he does. / No, he doesnt.7、5. What do you usually do after school? I usually do my homework.8、6. Where do you usually go in the afternoon? I usually go to the library.9、三、重点精析：10、1. 频率副词：always 总是 usually 通常11、often 经常 som
18、etimes 有时 never 从不12、2. do ones homework 做家庭作业13、3. on weekdays 在工作日 at the weekend 在周末14、4. play with 玩，玩弄，和为伴15、如：I want to play with you. 我想跟你一起玩。16、5. look for 寻找17、如：What do they look for? 他们在寻找什么？18、6. stare at 凝视，盯着 while 当的时候19、如：While he is playing computer games, his father stares at him.2
19、0、当他在玩电脑的时候，他的父亲盯着他。21、7. be afraid of sth. / doing sth. 害怕，担心，恐惧22、Dave很害怕狗。Dave is afraid of dog .8.Does Ben often go swimming? 本句中的主语Ben是第三人称单数。在一般现在时中，当主语是第三人称单数时，谓语动词也要用第三人称单数形式，即在动词原形后面加s或es。注：1）人称代词he, she, it是第三人称单数。如：She reads English book every morning.2）单个人名、地名或称谓主语时是第三人称单数。如 ：The dog lik
20、es running.3）单数可数名词或“this / that / the + 单数可数名词”作主语时，是第三人称单数。如：A horse is a useful animal. This book is mine.4）不定代词someone, somebody, nobody, everything, something等及指示代词this, that作主语时，是第三人称单数。如：Someone is under the tree. This is a pen.5）不可数名词作主语时为第三人称单数。如：The milk is in the glass.动词第三人称单数形式变化规律：1）一般
21、动词，直接在词尾加s。如：play-plays, want-wants, get-gets, like-likes等。2）以字母s、x、ch或o结尾的动词加es。如：go-goes, do-does, watch-watches等。3）以辅音字母+y结尾的动词，先把y变i，再加es。如：study-studies, fly-flies等。Unit 6 At the weekend1、课文短语：1.at the weekend 在周末 2.wake up 醒来 3.have a big breakfast 吃一顿丰盛的早餐 4.on Sunday 在周六5.have a swimming les
22、son 上一堂游泳课 6.go out for lunch 出去吃午饭 7.go to the cinema 去看电影8.have some fun 娱乐 9.stay at home 呆在家里二、句型：1. What do you do at the weekend? I often help my mother do the housework.2. Sometimes Tony likes staying at home and watching TV.3. She always plays table tennis in the gym after class.4. Does your
23、 mother often go swimming at the weekend? Yes, she does. / No, she doesnt.三、重点精析：1. be busy with sth. 忙于做某事 be busy doing sth. 忙于做某事如：She is busy with her children.她忙于照顾孩子。他正忙于做家庭作业。He is busy doing his homework.2. wake up 醒来，唤醒，叫醒Be quiet. Dont wake up your father.3. go out外出 go to the cinema 去电影院，
24、看电影stay at home 留在家里，呆在家里4. talk with sb. 和某人聊天5. introduce 介绍，引进 introduce myself 自我介绍如：Let me introduce a friend to you. = Let me introduce you a friend.让我介绍给你一个朋友吧。6. want to do sth. 想要做某事 want sb. to do sth 想要某人做某事她的父母向让她学习游泳。 _7. most of + 复数名词 大多数的如：most of us 我们大多数 most of them 他们大多数 most of
25、time 大部分时间8. make sb. + 形容词 使某人 make sb. do sth. 使某人做某事9. have fun = have a good time = enjoy oneself 玩的开心10. 频率副词：频率副词词义大致发生的频率always总是100% usually通常80% often经常60% sometimes有时30% never从不0Module 4 Foods and drinksUnit 7 Do you want coffee or tea?1、课文短语：1.drink. for lunch 午餐喝. 2.tea with milk 奶茶 3.a
26、bottle of juice 一瓶果汁 4.a glass of water 一杯水5.a box of milk 一盒牛奶 6.a cup of tea 一杯茶 7.a can of coke 一罐可乐 二、句型：1. Do you want coffee or tea?2. What do you want to drink for lunch? I want a large coke.3. Can I have a large coke? Yes you can No you cannot.4. What is your favourite food?三、重点精析：1. a bottl
27、e of 一瓶 a glass of 一杯 a box of 一盒a cup of 一杯 a can of 一罐 a bowl of 一碗2. something + 形容词something cold something new something interestingUnit 8 Lets have both1.tomato and egg soup 西红柿鸡蛋汤 2.have. for dinner 晚餐吃. 3.like to eat rice 喜欢吃米饭4.worry too much 太操心 5.eat soup 喝汤 6.for starters 作为第一道菜 7.start cooking 开始煮饭2、句型：3、1. Lets have both.4、2. What should we have for dinner?5、3. I want some snacks.6、4. My English friends enjoy bread, sandwiches, hamburgers, and fish and chips.7、5. Lingling will make egg soup for starter.
