Chapter 4Grade SevenGrade Sevenshawan Middle Schoolshawan Middle School初一年级组初一年级组深圳牛津英语七年级chapterA What do you know about?1 a decimal numbers2 a pair of odd numbers 3 a fraction4 zero5 add;plus6 subtract;minus7 mutiply; times 8 divide9 a number showing degrees10 a percentage11 a pair of even numbers12 equalsA +B 0C 5/8D E =F 13 45G 8 210H 90I J 0.82 K 45%L 深圳牛津英语七年级chapterNumbers, Everyones Language深圳牛津英语七年级chapter24561935891521=?深圳牛津英语七年级chapterCalculating Machinean abacusan abacus深圳牛津英语七年级chapterCalculating Machineone of the first one of the first calculating machines calculating machines accurateaccurate and fastand fastrepresentrepresentbeadswires5,7 2 4 thousandsthousands hundredshundreds tenstens onesonesan abacusan abacus深圳牛津英语七年级chapterCalculating Machinean electronic calculatoran electronic calculatoraddsubtractmultiply divide percentagesquare rootcalculatecalculate深圳牛津英语七年级chapterCalculating Machinean electronic calculatoran electronic calculatorA: What can an electronic calculator A: What can an electronic calculator do?do?B: It can _, _, B: It can _, _, _ and _._ and _.A: What else can it do?A: What else can it do?B: It can calculate _ and B: It can calculate _ and _._.addsubtractmultiplydividepercentagessquare roots深圳牛津英语七年级chapterCalculating Machinean electronic calculatoran electronic calculatorA: What can _ do?A: What can _ do?B: It _.B: It _.A: What else can it do?A: What else can it do?B: It _.B: It _.深圳牛津英语七年级chapterCalculating Machinepowerfula flashin your whole lifetimea computer深圳牛津英语七年级chapterCalculating MachineA _ is a very _ calculating A _ is a very _ calculating machine. In _, it can do a calculation machine. In _, it can do a calculation that you could not do _that you could not do _._.a computer computer powerful computer powerful a flash a flash in your whole in your wholelifetimelifetime powerfulpowerful a flasha flash in your whole lifetimein your whole lifetime深圳牛津英语七年级chapterRead the text深圳牛津英语七年级chapterCompetition深圳牛津英语七年级chapterAnswer the questions12345678深圳牛津英语七年级chapterWhy do people still use abacuses today?Because they are accurate and fast.深圳牛津英语七年级chapterWhat can an electronic calculator do?It can add, subtract, multiply and divide. It can also calculate percentages and square roots.深圳牛津英语七年级chapterHow fast can Shakuntala Devi calculate?She can calculate like lightning.深圳牛津英语七年级chapterHow long can a computer do a calculation?In a flash.深圳牛津英语七年级chapterHow long did the computer take to solve the difficult problem?A minute.深圳牛津英语七年级chapterWhat should people do to make computers calculate?People have to_ _. program them with instructions深圳牛津英语七年级chapterWhat do the beads on the wires represent?They represent _ _ ones, tens, hundreds, thousands and so on.深圳牛津英语七年级chapterHow many languages do you know? Everyone knows at least two his or her own language and the international language of numbers.Numbers: everyones language（他或她自己（他或她自己的语言）的语言）深圳牛津英语七年级chapter Ancient numbers In ancient times, people wrote numbers in many different ways. However, they nearly all counted in tens.different ways of writing the number 6（在古代）（在古代）（以很多（以很多不同的方式）不同的方式）（以十为单位）（以十为单位）深圳牛津英语七年级chapter Zero The system of numbers today consists of the numbers from 1 to 9 and 0(zero). The Indians first invented and developed the 1 to 9 system of numbers. They then invented the zero. The invention of the zero helped people write big numbers and calculate more easily. Now use each of these ten numbers once to write the biggest number. What is it?（数字体系）（数字体系）（invent. v. invention n. inventor n.）深圳牛津英语七年级chapter1 ancient: many many years ago (a)2 consists of: includes (b) 3 invented: made for the first time (b)4 accurate: without mistakes (a)5 percentages: amounts out of a hundred (a) C1 Find these words in the article on page 45. Read the words around them and choose the best meanings.深圳牛津英语七年级chapter A B1 international a grew bigger or stronger2 system b a group of things working together3 developed c count with numbers4 calculate d strong5 bottom e used by more than one country or nation6 powerful f in the lowest place C2 Find the words in Column A in the article and match them with the meanings in Column B.深圳牛津英语七年级chapter1 A calculating machine using wires and heads. An _2 A small machine using electronic power to do calculations. A _3 A very powerful machine for doing calculations. A_C3 What do the following descriptions refer to? Write down the correct names in the blanks. calculatorcomputerabacus深圳牛津英语七年级chapter May asks T M Li, the writer, some questions about his article on numbers. His answers are not always clear. Read the article and make Lis answers clearer. Write one word in each blank. 1 Every one knows it. Knows what? The Language of numbers.深圳牛津英语七年级chapter 2 Long ago, people wrote them in many different ways. Wrote what? Numbers.3. People all count in this way. In what way? In tens.4. The Indians invented that system of numbers. Which system of numbers? The 1 to 9 system.深圳牛津英语七年级chapter 5 The invention helped people write in big numbers. What invention? The invention of the zero. 6 They are fast and accurate. What? Abacuses. 7 Computers are very powerful ones. Very powerful what? Calculating machines.深圳牛津英语七年级chapterLanguage points深圳牛津英语七年级chapter1. at least 至少= not less than We should recite at least 10 English words every day.反义词: at most 至多The concert hall can hold at most 1,000 people.深圳牛津英语七年级chapter2. in ancient times 在古代= long long ago= once upon a timeIn ancient times, people used stones as money.ancient 反义词: modern 现代的times = age n. 时代 深圳牛津英语七年级chapter3. consist of 由组成= include = be made up of Our class consists of 25 girls and 30 boys.4. invent = make sth. for the first time v. 发明; 创造The ancient Chinese invented the compass.invention n. 发明 inventor 发明家深圳牛津英语七年级chapter5.develop = grow better or bigger v. 发展; 发育 development n. 发展The Indians first invented and developed the 1 to 9 system of numbers.developing adj. 发展中的developed adj. 发达的India is a developing country. The USA is a developed country.深圳牛津英语七年级chapter6. help sb (to ) do sth. = help sb. with sth.I like helping my mother do the housework.= I like helping my mother with the housework.7. stand for = represent 代表; 表示PRC stands for Peoples Republic of China. 深圳牛津英语七年级chapter8. in a flash = very quickly = in a very short time 一瞬间;很快A computer can do a calculation in a flash.电脑可以在一瞬间完成计算.9. Why not do sth.? = Why dont you do sth.?深圳牛津英语七年级chapterWhy not see a film tonight? = Why dont you see a film tonight?10.buy sb.sth.= buy sth. for sb.My mother bought me a new bike last month.=My mother bought a new bike for me last month.深圳牛津英语七年级chapter深圳牛津英语七年级chapterI .Imperative sentences 祈使句祈使句 1 祈使句祈使句:表示请求表示请求,命令命令,劝告劝告,祝愿或建议的句子祝愿或建议的句子. e.g. Close the window, please. e.g. Be quiet.2 使用祈使句应注意的几点使用祈使句应注意的几点.A: 肯定祈使句的谓语总是用动词原形肯定祈使句的谓语总是用动词原形. Be careful.小心小心 Have a good time.愿你玩得开心愿你玩得开心.深圳牛津英语七年级chapterB: 否定祈使句否定祈使句. 祈使句否定式的构成方法是祈使句否定式的构成方法是在动词原形前加在动词原形前加dontDont laugh.不要笑不要笑.Dont be late again.不要再迟到了不要再迟到了.C:与与please连用连用.可用于句首或句末可用于句首或句末.Sit down, please. 请坐请坐.Please dont get angry. 请不要生气请不要生气.深圳牛津英语七年级chapterD:以以let开头的祈使句开头的祈使句.Let me help you. 让我帮助你让我帮助你.Lets go to the cinema. 我们一起去电影院我们一起去电影院. 这类祈使句的否定式的形式如下这类祈使句的否定式的形式如下:Lets not hurry.let后的动词要用原形后的动词要用原形.深圳牛津英语七年级chapterII. 加减乘除表示法加减乘除表示法1. “加加”用用plus，and或或add表示；表示； “等于等于”用用is, equal等词表示。等词表示。2+3=? 可表示为：可表示为： How much is two plus three?2+3=5 Two plus three is five Two and three is equal to five Two and three is five Two added to three is five 深圳牛津英语七年级chapter加减乘除表示法加减乘除表示法2. “减减”用用 minus或或 subtract表示表示106? How much is ten minus six?10-6=4 Ten minus six is four Subtract six from ten ,and we get four. 深圳牛津英语七年级chapter3.“乘乘”用用times或或multiply表示表示3X4? How much is three times four?3X4=12 Three times four is twelveMultiply three by four，we get twelve Three multiplied by four is twelve 深圳牛津英语七年级chapter4. “除除”用用divide的过去分词形式表示的过去分词形式表示164=? How much is sixteen divided by four?1644 Sixteen divided by four is four Divide sixteen by four , and we get four. 深圳牛津英语七年级chapter 有关数字的命令和陈述数字命令数字命令 Add Add 甲甲 and (to) and (to) 乙乙 甲甲+乙乙 Subtract Subtract 甲甲 from from 乙乙 乙乙 - - 甲甲 Multiply Multiply 甲甲 by by 乙乙 甲甲乙乙 Divide Divide 甲甲 by by 乙乙 甲甲乙乙Add 3 and (to) 9Subtract 3 from 9 Multiply 3 by 9 Divide 9 by 3 3+9 9-3 39 93 深圳牛津英语七年级chapter数字的陈述 甲Plus乙is /equals 丙 甲+乙= 丙 甲minus乙is /equals丙甲-乙=丙 甲 times乙 is /equals丙 甲乙=丙 甲 divided by乙 is /equals 丙 甲乙=丙 3 plus 9 is /equals 12 3 +9 =12 9 minus 3 is /equals 3 9 - 3 = 6 3 times 9 is /equals 27 3 9 =27 9 divided by 3 is /equals 12 9 3 = 6深圳牛津英语七年级chapter练习数字命令法练习数字命令法A _ 2 _ 10S _ 4 _ 5M _ 3 _ 7D _ 6 _ 2用数字陈述法转换数字命令法用数字陈述法转换数字命令法_ p_ _ is /equals 12_ m _ _ is /equals 1_ t_ _ is /equals 21_ d _ by _ is /equals 3ddandubtractfromultiplybyivideby2lus105inus43imes76ivided2深圳牛津英语七年级chapter III. 基数词和序数词基数词:表示人或事物的数量 Eg. One ,Two 13-19都是以 teen结尾 表几十几时，在十位数和个位数之间添加连字符“-” E.g. twenty-one 21 表几百时，百位数与十位数或者百位数与个位数之间加and. three hundred and twenty 320 One hundred and one 101 深圳牛津英语七年级chapter基数词表示确切整数时，hundred /thousand后不加s E.g. 200 two hundred 当基数词表示不确定数字，如当基数词表示不确定数字，如 数十个的成百的，数十个的成百的，成千上万基数词以复数形式出现成千上万基数词以复数形式出现如：如： tens of 数十个的数十个的 hundreds of 数百个的数百个的 数千个的数千个的数百万个的数百万个的Thousands ofMillions of 深圳牛津英语七年级chapter序数词：表示人或事物的顺序序数词：表示人或事物的顺序 first/second/third 序数词变化规律序数词变化规律 序数词是在基数词的基础上变化而成的序数词是在基数词的基础上变化而成的多数序数词在基数词的基础上加多数序数词在基数词的基础上加 t h four fourth seven seventh第第1,第第2,第第3要注意要注意one first two second three third 8要减要减t , 9要减要减e再加再加thE.g. eight eighth nine ninth基数词以基数词以 ve结尾，变结尾，变 ve 为为f再加再加 ththirty thirtieth five fifth深圳牛津英语七年级chapterIV.小数表示法读法读法小数点的左边按基数词读（当小数点左边为零时，零可省略不读），小数点读point，小数点右侧各数位单独朗读0.5 zero point five ( point five)72.78 1.345 seventy-two point seven eightone point three four five 当小数数值大于1时 ，小数后的名词用复数；当小数数字小于1时，小数后面的名词用单数 1.5吨 one point five tons 0.49吨 zero point four nine ton 深圳牛津英语七年级chapter深圳牛津英语七年级chapterNow try a quiz about numbers. Listen to the instructions on the recording, and circle the right answer.1 1 80 80 49 49 17172 2 2.66 2.66 26% 26% 2/62/63 3 $75 $75 75% 75% 7575o o4 41/8 1/8 0.75 0.75 33335 5 56 56 65 65 66666 69090o o 90% 90% 1/9 1/97 2565 3881 7 2565 3881 2566 28812566 2881 2565 2881 2565 28818 1.8% 8 1.8% 80%80% 18% 18%9 $ 5,000 9 $ 5,000 $ 50, 000$ 50, 000 $ 50,000,000 $ 50,000,00010 30.510 30.5o o 13.513.5o o 35 35o o 深圳牛津英语七年级chapter1 Which one of these is an even number?2 Which one of these is a fraction?3 Which one of these is a percentage?4 Which one of these is a decimal number?5 Which one of these is an odd number?深圳牛津英语七年级chapter6 Which one of these is a number showing degrees?7 My phone number is 2565 2881.8 18 per cent of my classmates come to school on foot.9 This ring costs fifty thousand dollars.10 The highest temperature today was 30 point 5 degrees.深圳牛津英语七年级chapter深圳牛津英语七年级chapter深圳牛津英语七年级chapter深圳牛津英语七年级chapter深圳牛津英语七年级chapter深圳牛津英语七年级chapter 以以说说事事为为主主的的文文章章属属于于说说明明文文，说说明明文文主主要要包包括括地地点点介介绍绍、人人物物介介绍绍、知知识识简简介介、图图片片说明说明、图表说明图表说明、旅游安排旅游安排等。等。说说明明文文主主要要以以描描述述为为表表达达方方式式，来来说说明明某某个个事事物物的的类类别别、性性质质、特特征征、状状态态或或形形成成的的原原因因、发生发展的过程发生发展的过程等等。等等。 写说明文应注重客观事实，写说明文应注重客观事实，用事实说话用事实说话，抓住事物的抓住事物的特征特征，把地点、事物和事理，把地点、事物和事理解释清解释清楚楚，语言简明扼要语言简明扼要。深圳牛津英语七年级chapterTraffic accidents May asked Officer Chen about traffic accidents. Then she drew a line graph. Read the conversation and write the figures on the graph.深圳牛津英语七年级chapter3,7293,6443,7483,639深圳牛津英语七年级chapter 1 Use the verbs be, rise and fall in the simple past tense.2 Write the years and numbers of accidents in figures, not in words.B After drawing her graph, May wrote a paragraph about it. Part of the paragraph is given here. Complete it, following these instructions: The graph shows that there _ 3,691 accidents in 2001 in our city. In _, the number _ to _and _to _in _. In _, the number _ again to _. It _to _in _. Traffic accidents 2001-2005were 2002 rose 3,748 fell 3,644 2003 2004 rose 3,729 fell 3,639 2005深圳牛津英语七年级chapter要点齐全，意思连贯，符合逻辑，要点齐全，意思连贯，符合逻辑，无语法错误。无语法错误。 开头（开头（1分）分） 结尾（结尾（1分）分） 内容要点（内容要点（6分）分） 时态（时态（1分）分） 字数（字数（1分）分） 4个错误（扣个错误（扣 1分）分）评分标准评分标准深圳牛津英语七年级chapter