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单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,Chapter 4,The world of numbers,New Words,1.decimal,adj.,小数的，十进位的,n.,小数,2.fraction,n.,分数,a fraction of,一小部分,a fraction of a second,一瞬间,3.degree,n.,度，度数,10 10 degrees centigrade,degree,n.,学位,the degree of Master of Arts,文学硕士学位,4.percentage,n.,百分数,percent,n.,百分之一,30%thirty percent,10%,的儿童,ten percent of the children,5.positive number,正数,negative number,负数,Match the numbers with the words.,15,5,1.7,15%,decimal,negative number,percentage,fraction,degree,6.odd,adj.,奇数的，奇怪的,三是个奇数。,Three is _ _ number.,an odd experience,一个奇怪的经历,7.even,adj.,偶数的，相等的，均衡的,an even number,一个偶数,我们得分现在相等。,Our scores _ _ now.,an odd,are even,8.plus,prep.,加,add,v.,加，加入,3+4=7,3 _ 4 _ 7.,=3 _ 4 is/are/makes/equals 7.,=_ 3 _ 4 is/are/makes/equals 7.,=_ _ add 3 to 4,you _ 7.,A+A plus,plus,is/are/makes/equals,and,Add to,If you,get,9.equal,v.,等于,adj.,平等的,All men are equal in the eye of law.,法律面前人人平等。,10.minus,prep.,减,subtract,v.,减，减去,8 5=3,8 _ 5 _ 3.,=5 _ from 8 is/equals 3.,=If you _ 5 _ 8,you _ 3.,-5 minus five,minus is/equals,subtract,ed,subtract from,get,11.multiply,v.,乘,multiplies,multiplied,times,prep.,乘,3 5=15,_ 3 _ 5 _ 15.,=3 _ _ 5 is/equals 15.,=3 _ 5 is/makes/equals 15.,Multiply,by,is/equals,multipl,ied,by,times,12.divide,v.,除，除以,12 4=3,12 _ _ 4 is/equals 3.,divide into,把,分成,老师把全班分成四个组。,The teacher _ the class _,four groups.,divided by,divided into,Please read:,5+7=12 9+10=19,7-2=5 14-4=10,2,4=8 5,3=15,20,2=10 18,3=6,A,R,e,v,i,s,i,o,n,13.abacus,n.,算盘,(pl.)abacuses/abaci,14.wire,n.,丝，线,15.bead,n.(,有孔的,),珠子,16.calculate,v.,计算,calculator n.,计算器,calculation n.,计算,17.count,v.,数数,count sb.in,把某人算在内,18.invent,v.,发明,inventor n.,发明家,invention n.,发明,Edison was a great _.He,_ many things.All through,his life,he has a lot of useful _.,19.Egyptian,n.,埃及人,adj.,埃及,(,人,),的,an Egyptian,Egypt,n.,埃及,20.Indian,n.,印度人,adj.,印度,(,人,),的,India,n.,印度,inventor,invented,inventions,21.especially,adv.,尤其，特别,零是一个特别重要的数字。,Zero is _ _ important number.,22.international,adj.,国际的,an international language,国际语言,nation,n.,国家,national,adj.,国家的，国内的,a national holiday,全国的节日,an especially,23.ancient,adj.,古代的,modern,24.however,adv.,然而，不过,but,She felt ill.She went to work,however,and tried to concentrate.,She felt ill.,However,she went to work,and tried to concentrate.,She felt ill.She went to work and tried to,concentrate,however,.,25.nearly,adv.,几乎，差不多,她将近五十岁了。,She _ _ fifty years old now.,26.develop,v.,发展,developed,adj.,发达的,developing,adj.,发展中的,development,n.,发展,is nearly,a.Shenzhen has _ from a small,village into a modern city.,b.China is still a _ country.,c.The USA is a _ country.,developed,developing,developed,25.accurate,=correct,right adj.,精确的,他的消息是对的。,His information _ _.,is accurate,36.bottom,adj.,底部的,top,37.electronic,adj.,电子的,electronic calculator,电子计算器,electricity,n.,电,38.powerful,:strong adj.,强大的，强有力的,a powerful country,一个强大的国家,power,n.,力量，力,39.change,n.,找零,v.&n.,改变,这是你的找零。,Here _ your _.,自从,1979,年以来深圳发生了巨大的变化。,_ _ have taken place in,Shenzhen since 1979.,她一听到这个消息，表情马上变了。,Her expression _ when she _,the news.,is change,Great changes,changed heard,40.flight,n.,航班,fly flies flying flew v.,飞，飞行,41.,
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