Unit 9 It's one hundredIs this right, MisIs this right, Miss Li?s Li?Yes, it's right. Good!Thank you!Thank you!Please think again. Forty-six and fifty-four is...Oh! I'm wrong! It's one hundred.13 thirteen 14 fourteen 15 fifteen 16 sixteen17 seventeen 18 eighteen19 nineteen★13-19 数词构成方法：在有关的个位数词词尾加 -teenRead and count19 + 1=20nineteenplus oneistwentytwentythirtyfortyfiftysixtyseventyeightyninetyone hundred12+8= 24+6=38+2= 42+8=53+7= 67+3=71+9= 82+8=99+1=20 twenty30 thirty40 forty50 fifty60 sixty70 seventy80 eighty9090 ninety100 a hundred整十位数数词 20-90 构成：个位数词词尾加 -tytwenty-two twenty-three twenty-four twenty-fivetwenty-six twenty-seventwenty-eight twenty-ninetwenty+ one = twenty-one★★ 十位数数词构成：整十位数数词后加十位数数词构成：整十位数数词后加个位数词，中间用连字符号“个位数词，中间用连字符号“ -”-” 连接。连接。Say a rhyme英语数词不难记， 找出规律就容易。一至十二词各异， 一个一个单独记。后面加 teenteen 变十几 thirteen ， fifteen 看仔细。eighteen 只有一个 t ， 两个音节念清晰。二十至九十后加 ty ， twenty 不同重点记。forty 去掉字母 u ， thirty ， fifty 更出奇。十位数后个位数， 表示数值几十几，按序排列不费力， 连字符号莫丢弃。巧学妙记加努力， hundred 是你的好成绩！1. 试着去记住 100 以内的数。2. 预习 part A 。
