1 / 7 （OX）8A unit 4 Numbers PART A I .Vocabulary1. decimal 2. equal 3. fraction 4. plus 5. subtract 6. minus 7. multiply 8. divide 9. degree 10. percentage 11. especially 12. calculate 13. international 14. nearly 15. Egyptian 16. Greek 17. abacus 18. electronic 19. square 20. flash 21. amazing 22. lightning 23. instruction 24. accurate 25. thousand 26. million 27. copy 28. correctly 29. invent 30. powerful 31. living 32. solve 33. program 34. check 35. complete 36. lifetime 37. following 38. whole 39. brain 40. part 41. odd 42. even 43. Roman 44. develop 45. root 46. respond 47. inspector 48. accident49. temperature 50. population2 / 7 II . Useful Expressions 1. way of doing sth 做某事的方式2. in ancient times 在古代3. in many different ways 用很多不同的方式4. so⋯..that如此⋯⋯.以至于5. in a flash 转瞬间，立即6. turn off 关掉7. turn on 打开8. fall asleep 睡觉9. look at 看一看10. copy down 抄下来11. zero point three 0.3 12.one third 三分之一13.five eighths 八分之五14.add 3 and 9 三加九15.substract 3 from 9 九减三16.multiply 3 by 9 九乘三17.divide 9 by 3 九除三18.turn to 转向，求助19. traffic accidents 交通事故20.calculating machines 计算工具III ． Useful Structures/Grammar 1. Use you own living computer to solve the problems above. 2. Computers make it easier for us to calculate. 3. In ancient times, people wrote numbers in many different ways ,as these pictures of the numbers 7 show. 4. Some people call the brain a living computer. 5. In a flash, a computer can do a calculation which you couldn ’t do in your whole lifetime. 6. A modern electronic calculation can add, subtract ,multiply and divide. It can also calculate percentages and square roots. 7. Now he is so busy with his work ...
