山西省吕梁市高中英语 Module 5 A Lesson in a Lab Vocabulary and speaking精品课件 外研版必修1.ppt

外研版高一年级 必修1 module5 英语课件 vocabularyandspeaking 英语中基数词 序数词 分数 小数和百分数的读法 1 基数词的读法 a 先说 几十 再说 几 中间用连字符 如 23 89 b 先说 几百 再加and 再加末两位数 或末位数 如 223 416 809 twenty three eighty nine twohundredandtwenty three fourhundredandsixteen eighthundredandnine c 1000以上的数先从后向前数 每三位数加一 千分位 第一个 号前为thousand 第二个 号前为million 第三个 号前为billion 如 1 001 4 000 9 743 174 301 750 000 000 onethousandandone fourthousand ninethousand sevenhundredandforty three a one hundredandseventy fourthousand threehundredandone sevenhundredandfiftymillion 2 序数词的读法 序数词一般以与之相应的基数词加词尾 th构成 如 tenth 第十 但下面这些基数词在变序数词时 有特别的地方 如 a one two three five eight nine twelve first second third fifth eighth ninth twelfth b 以 ty结尾的词 要先变 y为 i 再加 eth 如 twenty forty c 以one two three five nine收尾的多位数词 要照第一条方法变 如 twenty one twenty two thirty five ninety nine ahundredandfifty three twentieth fortieth twenty first twenty second thirty fifth ninety ninth ahundredandfifty third 基数词表示分子 序数词表示分母 除了分子是 1 的情况外 序数词要用复数 如 2 3 7 9 5 12 one fourth two thirds seven ninths five twelfths twoandthree fifths thirtyandseven eighths 3 分数词的读法 2 3 5 30 7 8 一些特殊的表达法 a onehalf a onequarter threequarters 4 小数的读法 7 8 0 4 0 03 0 125 14 397 sevenpointeight zeropointfour zeropointzerothree zeropointonetwofive fourteenpointthreenineseven 5 百分数的读法27 45 86 twenty sevenpercent forty fivepercent eighty sixpercent canyousaythefollowinginenglishcorrectly 1 0002 00012 000112 000796 000 onethousand twothousand twelvethousand onehundred twelvethousand sevenhundred ninety sixthousand 879 457 eighthundred seventy ninethousand fourhundredandfifty seven 1 000 0009 000 00032 000 000212 000 000 onemillionninemillionthirty twomilliontwohundred twelvemillion 988 766 688 ninehundred eighty eightmillion sevenhundred sixty sixthousand sixhundredandeighty eight 987 654 321 ninehundred eighty sevenmillion sixhundred fifty fourthousand threehundredandtwenty one 1 000 000 000 onebillion 9 000 000 000 ninebillion 32 000 000 000 thirty twobillion 564 865 000 000 fivehundred sixty fourbillion eighthundred sixty fivemillion 978 876 675 467 ninehundred seventy eightbillion eighthundred seventy sixmillion sixhundred seventy fivethousand fourhundredandsixty seven let shaveamatchtoseewhocansaythefollowingnumberscorrectlyandquickly 765 847sevenhundred sixty fivethousand eighthundredandforty seven practice 2 756 980 000sevenhundred fifty sixmillion ninehundredandeightythousand3 345 567 887 987threehundred forty fivebillion fivehundred sixty sevenmillion eighthundred eighty seventhousand ninehundredandeighty seven 4 897 786 000 576eighthundred ninety sevenbillion sevenhundred eighty sixmillion fivehundredandseventy six5 786 087 670 756sevenhundred eighty sixbillion eighty sevenmillion sixhundred seventythousand sevenhundredandfifty six 6 987 765 654 345ninehundred eighty sevenbillion sevenhundred sixty fivemillion sixhundred fifty fourthousand threehundredandforty five readthesequestionsaloudandsaytheanswers whatis of6 000 000 2 howmuchis35 246 000plus12 800 000 3 whatis25 of200 000 000 threemillion forty eightmillion forty sixthousand fiftymillion 4 howmuchis260 408 396and5 284 700 twohundred sixty fivemillion sixhundred ninety threethousand ninety six5 whatis of1 000 500 000 sevenhundred fiftymillion threehundred seventy fivethousand6 whatis10 of800 000 000 eightymillion 1 51 61 74 7 onefifthonesixthoneseventhfoursevenths canyousaythefollowinginenglishcorrectly 7 1097 111 sevententhsninety sevenonehundredandeleventhsforty fiveeighty sevenths 总结 你能看出他们有什么特点吗 45 87 分子用基数词 分母用序数词 分子大于1 分母的序数词需要加s 另外 还有几个特殊表达的情况 1 21 41 33 42 3 onehalfonequarteronethirdthreequarterstwothirds nowlet ssay 2 55 89 103 85 6 practice two fifths five eighths nine tenths three eighths five sixths canyousaythefollowinginenglishcorrectly 0 50 80 761 23 pointfivep