Talk about the price of the clothes. How much is that hat? It’s five dollars. How much is/are…? It’s… /They’re… $7 $5 $6 $3 $9 $8

Numbers teneleventwelve thirteenfourteen four+teen → sixteen seventeen nineteen fifteen eighteen

1. 基数词的表达 1) one 到 twelve, 拼写和读音无规律可言, 只 能逐一记忆。 2) thirteen 到 nineteen ，表示 “ 十几 ” ，在个 位数后加后缀 -teen ，其中要注意 thirteen, fifteen 和 eighteen 的拼写。 3) twenty 到 ninety ，表示 “ 几十 ” ，以 ty 结 尾，但需注意 twenty, thirty, forty, fifty, eighty 的拼写。

4) 21~29 直到 91~99 ，表示 “ 几十几 ”, 用整 十位数加个位表示, 中间用连字符 “-” 把 十位和个位连接起来。 5) one hundred 意为 “ 一百 ” ，也可说 a hundred ， hundred 可加具体数字，如 nine hundred (900) 。

1a Listen and repeat

Write the numbers in 1a next to the correct words. Which rows of numbers are in the wrong places? 1b

ten __ eleven __ twelve __ thirteen __ fourteen __ twenty-five __ twenty-six __ twenty- seven __ twenty-eight __ twenty-nine __ twenty __ twenty-one __ twenty-two __ twenty-three __ twenty-four __ fifteen __ sixteen __ seventeen __ eighteen __ nineteen __ thirty __ thirty-one __

一、填表格，记数字。 tenthirteentwelve sixteennineteen twenty- one thirty-five eleven 13 fifteen 12 twenty 16 eighteen 19 thirty twenty- six 21 twenty- eight 35 thirty- nine Exercises

二、做数学题，学英语。 1. twenty-six - twelve - nine = _______ 2. sixteen ＋ eight ＋ eleven = _________ 3. eighteen - seven ＋ fifteen = ___________ 4. thirteen ＋ fourteen-twenty-five = _____ 5. twenty-nine - thirteen - ten = _________ 6. thirty-nine - twenty - five =_________ 7. twelve ＋ thirteen - fifteen= _________ 8. nineteen - eleven ＋ twenty =___________ five thirty-five twenty-six two six fourteen ten twenty-eight

Listen and circle the numbers you hear in 1a. 1c

Listen again. Circle the things in the picture that Kate and her mom talk about. Check (√) the thing Kate buys. 1d √

1e How much is the blue sweater? It’s 15 dollars. Ask and answer questions about the things in the picture above.