1、8AU4一、单词1、divide v.除以 divide by 除以 divideinto 分成subtract=minus v. 减去 eg:subtract 3 from 9=9 minus 3 9 减 3multiply v. 乘以 eg:multiply 3 by 9 3 乘以 9add=plus v. 加 addition n. 另外2、degree n. 度数 percentage n. 百分率 fraction n. 分数 square root 平方根3、calculate v. 计算 calculation n. 计算 calculator n. 计算器4、invent v.
2、 发明 invention n. 发明 inventor n. 发明家eg: Edison was a great inventor who had invented many things.All of the inventions are very useful nowadays.爱迪生是一个发明了很多东西的伟大发明家。如今，所有的发明都很有用。5、develop v. 发展，壮大 developing a. 发展中的 eg:China is a developing country. 中国是一个发展中国家。developed a. 发达的 eg:America is a develope
3、d country. 美国是个发达国家。develpoment n. 发展 with the development of 随着的发展eg: It develops along with the development of practice.它随著实践的发展而发展。6、accurate a. 正确无误的 accurately ad. 正确无误地7、electric a. 电的;导电的 ;发电的 electrical a. 与电有关的 ,电气科学的 electricity n. 电 electron n. 电子 electronic a. 电子的eg: electric kettles 电热壶
4、 electrical appliances 电器用品electronic equipment 电子设备8、in a flash = at very short time 转瞬间，立即 （提问用 How soon）9、solve v. 解决=workout solution n. 解决eg: It may take a long time to find a solution to the problem. 也许要花很长时间才能找到解决这个问题的办法。10、lightning n. 闪电 thurder n. 雷like lightning 闪电般的，飞快的11、check v. 检查，核查=
5、 examinecheck in 办理登记手续 check out 结帐离开二、词组1. a decimal number2. a pair of odd numbers3. a pair of even numbers4. different ways of writing numbers5. at least6. in ancient times7. in mant differebt ways8. in your whole lifetime9. the system of numbers10. a very important invention11. one of the first
6、 calculating machines12. program the computer13. his article on numbers14. in tens15. three hundred and seventy-five16. say each number separately17. fall asleep18. some figures about traffic accidents19. do a survey20. the average age of our classmates21. arrange the rest of the number22. instructi
7、ons and statements about numbers三、语法1、almost 与 nearly 的用法区别(1) 两者都可用来修饰不定代词、形容词、副词、动词、介词短语等，此时两者常可换用：Its almost nearly impossible. 那几乎是不可能的。(2) almost 可用于 any 以及 no, none, nobody, nothing, never 等否定词之前，但 nearly 一般不这样用：Almost any man can do it. 几乎任何人都会做。但是，两者都可用在否定动词之前：He almost nearly didn t catch t
8、he bus. 他差点没赶上公共汽车。(3) nearly 前可用 very, pretty, not 等词修饰，但 almost 之前不能用这些词：Its not nearly so difficult as you think. 这远不像你想像的那么难。 （not nearly 远远不）2、numbers(1)我们用基数词来数数，在所有的基数词中 hundred,thousand,million 不加 seg:3 three ; 12 twelve ; 40 forty ; 98 ninety-eight ; 1367982 one million three hundred and si
9、xty-seven thousand nine hundred and eight-two特殊：hundreds of ; thousands of ; millions of (2)我们使用序数词描述物体的位置或顺序。序数词由在数字后加 th 构成，除了first,second,third.eg: 5th fifth ; 8th eighth ; 9th ninth ; 12th twelfth ; 20th twentieth ; 21st twenty-first ; 100th hundredth(3)我们单独说每一个在小数点后的数字eg：7.145 seven point one f
10、our five ; 0.3 zero point three3、祈使句（1）Use the base form of verbs in posiytive imperatives.Add dont before the base form of verbs in negetive imperatives.eg:Give/Dont give me your homework,Ben.(2 )We may add please before the base form of verbseg:Please turn off/dont turn off your mobile phones.（3）W
11、e need to add be before adjectives when we use them as imperativeseg:Be/Dont be quiet,girls!四、句型1、 Everyone knows at least two-his or her own language and the international language of numbers.2、 In ancient times,people wrote numbers in many different ways,as these pictures of the number 6 show.3、 T
12、his was a very important invention because it made it easier to write big numbers and to calculate.4、 Abacuses are so fast and accurate that people still use them yoday.5、 A:How many traffic accidents were there in the year two thousand in our city?B:Three thousand six hundred and ninety-one.A:What about two thousand and four?B:Three thousand six hundred and forty-four.
