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牛津深圳版英語七上74theworldofnumbers之四-wenkub.com

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【正文】 minus 7 multiply, times 8 divide 9 a number showing degrees 10 a percentage 11 a pair of numbers 12 equals A What do you know about… j f c b a l i d h k g e 1 abacus: an old form of calculator 2 accurate: with no mistakes 3 ancient: very old 4 at least : not less than 5 bead: a small ball with a hole through the middle 6 calculate: use numbers to find answers 7 consist of: be made up of something 8 develop: grow bigger and/ or better 9 electronic: using electrons for power 10 electronic: using electrons for power 11 figure: a symbol rather than a word 12 flash: a very short time, an instant 13 however: yet 14 international: connected to more than one country or nation 15 invent: make for the first time 16 nearly: almost 17 powerful: strong 18 system: group of things/ parts that work together Fill in the blanks with correct words. 1. If you _______ 8 and 5 , you get 13. 2. I use the pocket ___________ to check my answers. 3. The UN is an ______________ anization which helps to keep a peaceful world. 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

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