牛津深圳版英語七上74《the world of numbers》之四-文庫吧
2024-11-11 00:37 本頁面
【正文】 4. The underground is part of Shenzhen’ s transport ___________. 5. The _________ Chinese drew pictures to show different meanings. add calculator international system ancient Fill in the blanks with correct words. 6. Before calculators were invented, the Chinese people used _________ to count. 7. Weather reports are not always __________. 8. Edison _________the light bulb after he had failed many times. 9. If you _________8 from 16, you get 8. 10. Our country is more __________than before. you _________ 28 by 7, the answer is 4. 12. The mittee _________of ten members. abacus accurate invented subtract powerful divide consists C1 Find these words in the article on page 73. Read the words around them and choose the best meanings. 1 ancient: many many years ago 2 consists of: includes 3 invented: made for the first time 4 accurate: without mistakes 5 percentages: amounts out of a hundred C2 Find the words in Column A in the diary on page 62 and match them with the meanings in Column B. A 1 international 2 system 3 developed 4 calculate 5 bottom 6 powerful B a grew bigger or stronger b a group of things working together c count with numbers d strong e used by more than one country or nation f in the lowest place C3 What do the following descriptions refer to? Write down the correct names in the blanks. 1 A calculating machine that uses wires and heads. An ___________ 2 A small machine that does calculations. A ___________ 3 A very powerful machine for doing calculations. A__________ abacus calculator puter Calculating Machine an abacus Calculating Machine ? one of the first calculating machines ? accurate and fast ? represent beads wires 5,7 2 4 — thousands — hundreds — tens — ones an abacus Calculating Machine an electronic calculator add subtract multiply divide percentage square root calculate Calculating Machine an electronic calculator A: What can an electronic calculator do? B: It can _________, _________, _________ and _________. A: What else can it do? B: It can calculate ___________ and ___________. add subtract multiply divide percentages square roots Calculating Machine A ________ is a very _______ calculating machine. ______, it can do a calculation that you could not do __________________. a puter puter ? powerful ? in a flash ? in your whole lifetime powerful In a flash in your whole lifetime Numbers: everyone’s language 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） （以很多不同的方式） （以十為單位） Numbers: everyone’s language 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
教學(xué)課件相關(guān)推薦
鄂ICP備17016276號-1