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1、1.Cardinals and Ordinals 基数和序数 (1)100以内的数词 基数 序数 Roman Arabic Numerals Numerals 罗马数字 阿拉伯数字 读法 数码 读法 I 1 one 1st the first II 2 two 2nd the second III 3 three 3rd the third IV 4 four 4th the fourth V 5 five 5th the fifth VI 6 six 6th the sixth VII 7 seven 7th the seventh VIII 8 eight 8th the eighth I
2、X 9 nine 9th the ninth X 10 ten 10th the tenth XI 11 eleven 11th the eleventh XII 12 twelve 12th the twelfth XIII 13 thirteen 13th the thirteenth XIV 14 fourteen 14th the fourteenth XV 15 fifteen 15th the fifteenth XVI 16 sixteen 16th the sixteenth XVII 17 seventeen 17th the seventeenth XVIII 18 eig
3、hteen 18th the eighteenth XIX 19 nineteen 19th the nineteenth XX 20 twenty 20th the twentieth XXI 21 twenty-one 21st the twenty-first XXV 25 twenty-five 25th the twenty-fifth XXX 30 thirty 30th the thirtieth XL 40 forty 40th the fortieth L 50 fifty 50th the fiftieth LX 60 sixty 60th the sixtieth LXX
4、 70 seventy 70th the seventieth LXXX 80 eighty 80th the eightieth XC 90 ninety 90th the ninetieth IC 99 ninety-nine 99th the ninety-ninth C 100 one hundred 100th the hundredth CII 102 a hundred 102nd the (one) hundred and two and second 246 two hundred and forty-six 751 seven hundred and fifty-one (
5、2)1000以上的数词 1,000 = one thousand 一千 10,000 = ten thousand 一万 100,000 = one hundred thousand 十万 1,000,000 = one million 一百万 10,000,000 = ten million 一千万 100,000,000=one hundred million 一亿 (3)十亿以上的大数，英美有不同的读法： 英国 美国 十亿 one thousand million = one billion 百亿 ten thousand million = ten billion 千亿 one hun
6、dred thousand million = one hundred billion 万亿 one billion = one trillion 2.Fractions 分数 通常将分子读为基数，将分母读为序数。 1/2 = a (or one) half 1/3 = a (or one) third 1/4 = a quarter or one fouth 1/5 = a (or one) fifth 2/3 = two thirds 9/10 = nine tenths 53/4 = five and three quarters 15/64= fifteen over (or by)
7、sixty-four 15% = fifteen per cent 4 = four per mill 3.Decimals 小数 0.4 = zero (or nought) point four .01 = point (or decimal) nought one 12.34 = twelve point three four 567.809 = five hundred and sixty-seven point eight nought nine 30.45 = thirty point four five, five recurring 0.3% = decimal three p
8、ercent 4.Mathematic Forms 数学式 (1) Addition 加法 1+2=3 One and two are three. 2+3=5 Two plus three equals five. 4+0=4 Four and nought is equal to four. 45+70+152=267 45,70 and 152 added are (or make) 267 the sum (or total) is 267. 演算时的读法： Three and seven are ten; I write(or I write down,or I put down)a
9、 nought and carry one. Four and one that I carry are five, and eight make thirteen,and three sixteen; I write down six and carry one. One and one (that I carry) are two; I put down two.- The sum (or total, or the result of the addition) is two hundred and sixty. 37,80 and 143 added together, and(or
10、make) 260. (2)Subtraction 减法 9-4=5 Nine minus four equals (or is equal to) five. 15-7=8 Seven from fifteen leaves eight. 23,654-8,175=15,479 8,175 (take or subtracted) from 23,654 leaves 15,479. The difference (or The remainder) is 15,479. Nine from five wont go. 演算时的读法：Nought from nought (leaves) n
11、ought. One from one leaves nought (or nothing). Two from three (leaves) one. I cant take (or subtract) five from four; I must borrow ten; five from fourteen leaves nine.- The difference (or The remainder) is nine thousand one hundred. 5210 (take or substracted) from 14,310 leaves 9,100. (3)Multiplic
12、ation 乘法 10=0 One multiplied by nought equals nought. 11=1 Once one is one. 21=2 Twice one is two. 35=15 Three times five is fifteen 60=0 Multiply six by nothing, and the result is nothing. 演算时的读法: Five times nine (or Nine multiplied by five) are forty-five; I put down five and carry four. Five time
13、s seven are thirty-five and four (that I carry) are thirty-nine; I write down nine and carry three. Five times six make thirty and three (that I carry) thirty-three; I put down thirty-three. Eight times nine (or Eight nine) are seven two; I write two and carry seven. Eight sevens make fifty-six and
14、seven are sixty-three. I put down three and carry six. Eight sixes make forty-eight and six fifty-four; I write down fifty-four. I now add the partial results (or products) Five. Two and nine are eleven. Three and three are six and one are seven. Four and three make seven. Five. (4)Division 除法 93=3 Nine divided by three maks (or is equal to) three. 205=4 Five into twenty goes four times. 456723=198余13 23 into 4567 goes 198 times, and 13 remainder. The quctient is 198, and 13 remainder. 演算时的读法: Fifteen into thirteen wont go ; fifteen into one hundred and thirty-
