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1、【最新】七年级英语上册 chapter 4 The world of numbers 课件 深圳牛津版 课件ReadingListeningLanguageSpeakingWriting【最新】七年级英语上册 chapter 4 The world of numbers 课件 深圳牛津版 课件【最新】七年级英语上册 chapter 4 The world of numbers 课件 深圳牛津版 课件A What do you know about We all use numbers in our daily life. Numbers are an international languag
2、e. What do you know about the language of numbers? 【最新】七年级英语上册 chapter 4 The world of numbers 课件 深圳牛津版 课件Learn the following: A decimal number is written as A decimal number is written as a dota dot. .eg. 0.65 (zero point six five/ sixty-five)eg. 0.65 (zero point six five/ sixty-five) 8.08 (eight po
3、int o eight.) 8.08 (eight point o eight.)Read the following:Read the following:7.53, 3.42, 0.01, 86.207.53, 3.42, 0.01, 86.201 a decimal number( 小数）小数）【最新】七年级英语上册 chapter 4 The world of numbers 课件 深圳牛津版 课件 Odd numbers cannot be divided by two Odd numbers cannot be divided by two to give a whole numb
4、er without a to give a whole number without a fraction.fraction. 2 odd numbers (奇数）奇数） 3 even numbers (奇数）奇数） Even numbers can be divided by two to Even numbers can be divided by two to give a whole number.give a whole number.【最新】七年级英语上册 chapter 4 The world of numbers 课件 深圳牛津版 课件 A fraction is the e
5、xact division of a A fraction is the exact division of a number.number. eg. : one half eg. : one half 2/3: two thirds 2/3: two thirds a quarter a quarter 1/10 one tenth 1/10 one tenthRead the following:Read the following:3/5, 6/11, 1/83/5, 6/11, 1/8 4 a fraction (分数分数） 【最新】七年级英语上册 chapter 4 The worl
6、d of numbers 课件 深圳牛津版 课件 5 plus , add (加）加） Two plus five is seven.Two plus five is seven.Two and five is seven.Two and five is seven.Two added to five is seven.Two added to five is seven.3+ 12 =?3+ 12 =?What is 3 plus twelve? What is 3 plus twelve? Read the following:Read the following:25 + 24 = 49
7、 30 + 12 = ?25 + 24 = 49 30 + 12 = ? 【最新】七年级英语上册 chapter 4 The world of numbers 课件 深圳牛津版 课件 6 minus (减，减号，负号）减，减号，负号） subtract (减减)12-3=912-3=9Twelve minus three is nine.Twelve minus three is nine.Three subtracted from twelve is nine.Three subtracted from twelve is nine. Read the following:Read the
8、following:2-2=0 19- 12=7 97-65=?2-2=0 19- 12=7 97-65=? 【最新】七年级英语上册 chapter 4 The world of numbers 课件 深圳牛津版 课件 7 times, multiply 乘乘 Two times three is six.Two times three is six.Two and three multiply makes six.Two and three multiply makes six.Two multiplied by three makes 6.Two multiplied by three m
9、akes 6. Read the following:Read the following:16 16 4 = 64 5 4 = 64 5 3 = 15 3 = 15【最新】七年级英语上册 chapter 4 The world of numbers 课件 深圳牛津版 课件 8 divide 除除30 6 = 530 6 = 5Thirty divided by six is five.Thirty divided by six is five.Read the following:Read the following:20 20 4 = 5 18 4 = 5 18 3 = 6 3 = 6 【
10、最新】七年级英语上册 chapter 4 The world of numbers 课件 深圳牛津版 课件 45% 45% = = 90 90o oa percentageequalsa number showing degrees【最新】七年级英语上册 chapter 4 The world of numbers 课件 深圳牛津版 课件Match the words with the pictures, signs and numbers.【最新】七年级英语上册 chapter 4 The world of numbers 课件 深圳牛津版 课件1 a demical number2 a p
11、air of odd numbers3 a fraction4 zero5 add; plus6 subtract; minus 7 multiply, times8 divide9 a number showing degrees10 a percentage11 a pair of numbers12 equalsA What do you know aboutjfcbalidhkge【最新】七年级英语上册 chapter 4 The world of numbers 课件 深圳牛津版 课件1 abacus: an old form of calculator2 accurate: wit
12、h no mistakes3 ancient: very old4 at least : not less than5 bead: a small ball with a hole through the middle6 calculate: use numbers to find answers7 consist of: be made up of something8 develop: grow bigger and/ or better9 electronic: using electrons for power 【最新】七年级英语上册 chapter 4 The world of nu
13、mbers 课件 深圳牛津版 课件10 electronic: using electrons for power11 figure: a symbol rather than a word12 flash: a very short time, an instant13 however: yet14 international: connected to more than one country or nation15 invent: make for the first time16 nearly: almost17 powerful: strong18 system: group of
14、 things/ parts that work together【最新】七年级英语上册 chapter 4 The world of numbers 课件 深圳牛津版 课件Fill in the blanks with correct words.1.1. If you _ 8 and 5 , you get 13. If you _ 8 and 5 , you get 13.2.2.I use the pocket _ to check my I use the pocket _ to check my answers.answers.3.3.The UN is an _ organiza
15、tion The UN is an _ organization which helps to keep a peaceful world.which helps to keep a peaceful world.4.4.The underground is part of Shenzhens The underground is part of Shenzhens transport _.transport _.5.5.The _ Chinese drew pictures to The _ Chinese drew pictures to show different meanings.s
16、how different meanings.addcalculatorinternationalsystemancient【最新】七年级英语上册 chapter 4 The world of numbers 课件 深圳牛津版 课件Fill in the blanks with correct words.6. Before calculators were invented, the 6. Before calculators were invented, the Chinese people used _ to count.Chinese people used _ to count.7.
17、 Weather reports are not always _.7. Weather reports are not always _.8.8.Edison _the light bulb after he had Edison _the light bulb after he had failed many times.failed many times.9.9.If you _8 from 16, you get 8.If you _8 from 16, you get 8.10.10. Our country is more _than before. Our country is
18、more _than before.11.11.If you _ 28 by 7, the answer is 4.If you _ 28 by 7, the answer is 4.12.12. The committee _of ten members. The committee _of ten members.abacusaccurateinventedsubtractpowerfuldivideconsists【最新】七年级英语上册 chapter 4 The world of numbers 课件 深圳牛津版 课件C1 Find these words in the article
19、 on page 73. Read the words around them and choose the best meanings. 1 ancient: many many years ago2 consists of: includes3 invented: made for the first time4 accurate: without mistakes5 percentages: amounts out of a hundred 【最新】七年级英语上册 chapter 4 The world of numbers 课件 深圳牛津版 课件C2 Find the words in
20、 Column A in the diary on page C2 Find the words in Column A in the diary on page 62 and match them with the meanings in Column 62 and match them with the meanings in Column B.B. A 1 international 2 system3 developed4 calculate5 bottom6 powerful Ba grew bigger or strongerb a group of things working
21、togetherc count with numbersd stronge used by more than one country or nationf in the lowest place【最新】七年级英语上册 chapter 4 The world of numbers 课件 深圳牛津版 课件C3 What do the following descriptions refer to? Write down the correct names in the blanks.1 A calculating machine that uses wires and 1 A calculati
22、ng machine that uses wires and heads.heads. An _An _2 A small machine that does calculations.2 A small machine that does calculations. A _A _3 A very powerful machine for doing 3 A very powerful machine for doing calculations.calculations. A_A_ abacuscalculatorcomputer【最新】七年级英语上册 chapter 4 The world
23、 of numbers 课件 深圳牛津版 课件Calculating Machinean abacusan abacus【最新】七年级英语上册 chapter 4 The world of numbers 课件 深圳牛津版 课件Calculating Machinenone of the first calculating machines naccurate and fastnrepresentbeadswires5,7 2 4 thousandsthousands hundredshundreds tenstens onesonesan abacusan abacus【最新】七年级英语上册
24、 chapter 4 The world of numbers 课件 深圳牛津版 课件Calculating Machinean electronic calculatoran electronic calculatoraddsubtractmultiply divide percentagesquare rootcalculatecalculate【最新】七年级英语上册 chapter 4 The world of numbers 课件 深圳牛津版 课件Calculating Machinean electronic calculatoran electronic calculatorA:
25、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【最新】七年级英语上册 chapter 4 The
26、 world of numbers 课件 深圳牛津版 课件Calculating MachineA _ is a very _ calculating machine. _, it can do a calculation that you could not do _.a computer computer npowerfulnin a flashnin your whole lifetime powerful In a flash in your whole lifetime 【最新】七年级英语上册 chapter 4 The world of numbers 课件 深圳牛津版 课件Num
27、bers: everyones languageAncient numbersAncient 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）（以很多不同的方式）（以很多不同的方式）（以十为单位）（以十为单位）【最新】七年级英语上册 chapter 4 The world of numbers 课件 深圳牛津版 课件Numbe
28、rs: everyones languageZero(0)Zero(0) 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. N
29、ow use each of these ten numbers once to write the biggest number.What is it?（数字体系）（数字体系）（由（由组成）组成）（印度人）（印度人）（发展）（发展）（invent. v. invention n. inventor n.）9876543210【最新】七年级英语上册 chapter 4 The world of numbers 课件 深圳牛津版 课件Numbers: everyones languageCalculating machines (Calculating machines (计算工具）算工具） o
30、ne of the first calculating machines was an abacus. Abacuses are fast and accurate. On the abacus, the beads on the wires stand for ones, tens, hundreds and thousands, starting from the bottom wire.（珠子（珠子 ）（代表（代表stand for ）（底部的横杆）（底部的横杆）The abacus in the picture shows a number. Write it down in figu
31、res and then in words. Multiply it by zero and then add 1. What is the answer?（用数字）（用数字）（用文字）（用文字）【最新】七年级英语上册 chapter 4 The world of numbers 课件 深圳牛津版 课件Numbers: everyones language Modern electronic calculators can add, subtract, multiply and divide. It can also calculate percentages and square roots
32、.（平方根）（平方根）【最新】七年级英语上册 chapter 4 The world of numbers 课件 深圳牛津版 课件Numbers: everyones language Computers are very powerful calculating machines. A computer can do a calculation in a flash, but you might not be able to do it in your whole lifetime.（强大的）（强大的）（做计算）（做计算）（一瞬间）（一瞬间）（能够做）（能够做）（一辈子）（一辈子）【最新】七
33、年级英语上册 chapter 4 The world of numbers 课件 深圳牛津版 课件May is asking 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. 【最新】七年级英语上册 chapter 4 The world of numbers 课件 深圳牛津版 课件 1 Ever
34、y one knows it. Knows what? The Language of numbers. 2 Long ago, people wrote them in many different ways. Wrote what? Numbers.【最新】七年级英语上册 chapter 4 The world of numbers 课件 深圳牛津版 课件3. People all count in this way. In what way? In tens.4. The Indians first invented that system of numbers. Which syste
35、m of numbers? 1 to 9.5. The invention helped people write in big numbers. What invention? Zero.【最新】七年级英语上册 chapter 4 The world of numbers 课件 深圳牛津版 课件6. They are fast and accurate. What? Abacuses.7Computers are very powerful ones. Very powerful what? Calculating machines.【最新】七年级英语上册 chapter 4 The wor
36、ld of numbers 课件 深圳牛津版 课件Give answers to these questions about the article.1 How did people in ancient times count in the same way? They nearly all _.2 What do the beads on the wires of an abacus stand for? The beads stand for _ starting from the bottom wire.3 What can a modern electronic calculator
37、 do? It can _.counted in tensones, tens, hundreds and thousandsadd, subtract, multiply and divide.【最新】七年级英语上册 chapter 4 The world of numbers 课件 深圳牛津版 课件Give answers to these questions about the article.4 What else can a modern electronic calculator do ? I can also _.5 How quickly can a computer do a
38、 calculation? I can do a calculation _. calculate percentages and square rootsin a flash【最新】七年级英语上册 chapter 4 The world of numbers 课件 深圳牛津版 课件1 1以不同的方式以不同的方式2 2数字体系数字体系3 3由由组成组成4 4电子计算器电子计算器5 5平方根平方根6 6一瞬间一瞬间7 7以十为单位计算以十为单位计算代表代表9 9 做运算做运算10 10 在古代在古代1 in different ways1 in different ways2 the syste
39、m of numbers2 the system of numbers3 consist of= be made up of3 consist of= be made up of4 electronic calculators4 electronic calculators5 square roots5 square roots6 in a flash6 in a flash7 count in tens7 count in tens8 stand for8 stand for9 do a calculation9 do a calculation10 in ancient times10 i
40、n ancient times【最新】七年级英语上册 chapter 4 The world of numbers 课件 深圳牛津版 课件Synopsis by paragraph:P1:P1:Ancient numbers Ancient numbers In ancient times, numbers In ancient times, numbers were written in different were written in different ways, but counting was ways, but counting was nearly always in tens
41、.nearly always in tens.【最新】七年级英语上册 chapter 4 The world of numbers 课件 深圳牛津版 课件Synopsis by paragraph:P2:P2:Zero- Everyone uses the Zero- Everyone uses the number system 1 to 9 plus number system 1 to 9 plus 0. The system was 0. The system was invented by the Indians. invented by the Indians. Zero make
42、s it easier to Zero makes it easier to write big numbers and to write big numbers and to calculate.calculate.【最新】七年级英语上册 chapter 4 The world of numbers 课件 深圳牛津版 课件Synopsis by paragraph:P3-5:P3-5:Calculating machines Calculating machines Descriptions of three Descriptions of three calculating machine
43、s:calculating machines: the ancient abacus,the the ancient abacus,the modern electronic calculator modern electronic calculator and the computer.and the computer. 【最新】七年级英语上册 chapter 4 The world of numbers 课件 深圳牛津版 课件【最新】七年级英语上册 chapter 4 The world of numbers 课件 深圳牛津版 课件Now try a quiz about numbers.
44、 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%8
45、0% 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 【最新】七年级英语上册 chapter 4 The world of numbers 课件 深圳牛津版 课件1 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 i
46、s a decimal number?5 Which one of these is an odd number?【最新】七年级英语上册 chapter 4 The world of numbers 课件 深圳牛津版 课件6 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
47、 temperature today was 30 point 5 degrees.【最新】七年级英语上册 chapter 4 The world of numbers 课件 深圳牛津版 课件【最新】七年级英语上册 chapter 4 The world of numbers 课件 深圳牛津版 课件A Imperative sentencesWhen we give orders or instructions to people, we tell them to do or not to do something.We usually start the sentences with a v
48、erb.We often make instructions more polite by starting with please.Sometimes we start with the name of the person receiving the instruction.【最新】七年级英语上册 chapter 4 The world of numbers 课件 深圳牛津版 课件Read the instructions belowBe quiet.Please have a seat.David, pay attention.Dont be afraid.Please do not m
49、ake a noise.Alan, dont be late.【最新】七年级英语上册 chapter 4 The world of numbers 课件 深圳牛津版 课件Read the dialogues and complete them with imperatives and the correct form of the verbs in brackets.1 Its her birthday next week. Then _ her about the surprise party.2 How can I get to Peoples Hospital? _ along the
50、street and _left at the lights.3 We have to finish the work in two hours. Then lets _ any time.4 _ so much noise, please. OK.5 _ out! Theres a car coming. Thanks.dont tellGoturnnot wasteDont makeLook【最新】七年级英语上册 chapter 4 The world of numbers 课件 深圳牛津版 课件Add 3 and 9.Subtract 3 from 9.Multiply 3 by 9.D
51、ivide 9 by 3.B Instructions and statements about numbersTable I【最新】七年级英语上册 chapter 4 The world of numbers 课件 深圳牛津版 课件3 plus 9 equals/ is 12.9 minus 3 equals/ is 6.3 multiplied by 9 equals/is 27.9 divided by 3 equals/ is 3.B Instructions and statements about numbersTable II【最新】七年级英语上册 chapter 4 The w
52、orld of numbers 课件 深圳牛津版 课件 Work in pairs to work out the problems. Work in pairs to work out the problems. S1 tells S2 to do the following sums. S1 tells S2 to do the following sums. S2 listens and replies. Then check your S2 listens and replies. Then check your answers together.answers together.【最
53、新】七年级英语上册 chapter 4 The world of numbers 课件 深圳牛津版 课件1 1 AddAdd 11 11 and and 1.1.2 2 SubtractSubtract 5 5 from from 13.13.3 3 MultiplyMultiply 7 7 byby 8. 8.4 4 Divide Divide 1616 by by 4. 4.5 5 Add Add 9 9 andand 6. 6.6 6 Add Add 14 and 4 and 14 and 4 and dividedivide the the answer by 2. answer by
54、 2.7 7 SubtractSubtract 9 from 19 and 9 from 19 and multiplymultiply the answer by 3. the answer by 3.S1【最新】七年级英语上册 chapter 4 The world of numbers 课件 深圳牛津版 课件1 111 plus 1 equals 12.11 plus 1 equals 12.2 213 minus 5 equals 8.13 minus 5 equals 8.3 37 multiplied7 multiplied by by 8 equals 56.8 equals 5
55、6.4 416 divided16 divided by by 4 equals 44 equals 4. .5 59 plus 6 equals 15.9 plus 6 equals 15.6 614 plus 4 divided14 plus 4 divided by by 2 equals 92 equals 9. .7 719 minus 9 multiplied19 minus 9 multiplied by by 3 equals 303 equals 30. .S2【最新】七年级英语上册 chapter 4 The world of numbers 课件 深圳牛津版 课件1 Th
56、ink of a number, but dont tell me what it is.2 Add 1.3 Multiply the answer by 2.4 Now add 3.5 Now multiply by 2 again.6 Now subtract 10.7 Now tell me the answer.【最新】七年级英语上册 chapter 4 The world of numbers 课件 深圳牛津版 课件C cardinal and ordinal numbers Say these cardinal numbers. 1 13 13 30 323 13 30 32 5
57、15 50 54 5 15 50 54 6 16 60 67 6 16 60 67 9 19 90 98 9 19 90 982 100 200 210 3752 100 200 210 375 1,000 4,189 1,000 4,189 15, 362 15, 362 100,000 100,000 【最新】七年级英语上册 chapter 4 The world of numbers 课件 深圳牛津版 课件C cardinal and ordinal numbers3 3 284,653284,653 two hundred and eighty-four two hundred and
58、 eighty-four thousand six hundred and fifty-thousand six hundred and fifty-threethree 1,000,0001,000,000 one million one million 1,367,982 1,367,982 one million three hundred and one million three hundred and sixty-seven thousand nine hundred sixty-seven thousand nine hundred and eighty-twoand eight
59、y-two 【最新】七年级英语上册 chapter 4 The world of numbers 课件 深圳牛津版 课件C cardinal and ordinal numbers Say these sentences with ordinal numbers.Position in class Position in class May: 1 May: 1 May is first.May is first. Alan: 2Alan: 2Danny: 3Danny: 3June: 4June: 4Peter: 12Peter: 12Alice: 19Alice: 19Steve: 28St
60、eve: 28【最新】七年级英语上册 chapter 4 The world of numbers 课件 深圳牛津版 课件C cardinal and ordinal numbers Say these decimals.3 : .3 : point threepoint three0.30.3zero point threezero point three.368.368point three six eightpoint three six eight7.1457.145seven point one four fiveseven point one four five36.3636.36
61、thirty-six point three sixthirty-six point three six【最新】七年级英语上册 chapter 4 The world of numbers 课件 深圳牛津版 课件【最新】七年级英语上册 chapter 4 The world of numbers 课件 深圳牛津版 课件A Talk time A1 Read these telephone numbers.2921 51432921 51432565 13512565 13512471 01222471 01222389 41672389 41672010 51002010 51002724 5
62、5662724 55662978 11212978 11212356 43992356 4399 When we say telephone When we say telephone or ID card numbers, or ID card numbers, we say each number we say each number separately. For separately. For 0 0 we we say say zerozero or or ohoh. When . When two of the same two of the same number are tog
63、ether, number are together, we can say we can say doubledouble before the number.before the number.【最新】七年级英语上册 chapter 4 The world of numbers 课件 深圳牛津版 课件B Speak upYour school received a gift or 35,000 yuan from Mr. Tang, an old student of the school.His instructions are: the school must use the mone
64、y to buy the school must use the money to buy three different things;three different things;a group of students must decide what a group of students must decide what three things to buy.three things to buy.【最新】七年级英语上册 chapter 4 The world of numbers 课件 深圳牛津版 课件B1 Work in groups of four and:1 decide t
65、he three things to buy with the money and check the price of each thing.2 Calculate the total price of the three things and work out the amount of money left.3 write an announcement of your decision to the class, using the words below to help you.【最新】七年级英语上册 chapter 4 The world of numbers 课件 深圳牛津版 课
66、件B1 Work in groups of four 【最新】七年级英语上册 chapter 4 The world of numbers 课件 深圳牛津版 课件【最新】七年级英语上册 chapter 4 The world of numbers 课件 深圳牛津版 课件Traffic accidents May asked Officer Chen about traffic accidents. Then she drew a line graph. Read the conversation and write the figures on the graph.【最新】七年级英语上册 ch
67、apter 4 The world of numbers 课件 深圳牛津版 课件3,7293,6443,7483,639【最新】七年级英语上册 chapter 4 The world of numbers 课件 深圳牛津版 课件 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.
68、 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【最新】七年级英语上册 chapter 4 The world of numbers 课件 深圳牛津版 课件【最新】七年级英语上册 chapter 4 The world of numbers 课件 深圳牛津版 课件
