Unit 7 Section A 1a- 2d 课件2022-2023学年人教版八年级英语下册

Unit 7 What’s the highest mountain in the world? Section A 1a-2d What’s it? What’s the highest mountain in the world? Qomolangma. /ˈtʃəʊməʊˌlɑːŋmə/ It’s a mountain. Let’s guess. What’s it? What’s the longest river in the world? The Nile. /naɪ/ It’s a river. Let’s guess. It’s a lake. Salt lake. What’s the deepest lake in the world? The Caspian Sea. /ˈkæspɪən/ What’s it? Let’s guess. Let’s guess. What’s it? What’s the biggest desert in the world? The Sahara. /səˈhɑːrə/ It’s a desert /ˈdezət/. The expression of numbers 4 21 128 5,820 Read these numbers four twenty-one one hundred and twenty- eight five thousand eight hundred and twenty How about these? 886,510 2,019 7,725,385 84.14 111 ,111 ,111 要读一组长数字，可以先把这组数字分3个数字一组用逗号隔开 111111111 million （百万） thousand （千） 英语里没有万，十万的表达 一万：ten thousand 十万： one hundred thousand 7 Have a try 86，510 eighty-six thousand five hundred and ten 2，019 two thousand and nineteen 百位数没有，不读 7，725，385 seven million seven hundred and twenty-five thousand three hundred and eighty-five Have a try 9，600，000 nine million six hundred thousand 84 . 14 eighty-four point one four 小数点用point表示 Can you read these large numbers? hundred 百 thousand 千 million 百万 billion 十亿 trillion 万亿/兆 9,600,000 1,025 6,671 8,844.43 nine million six hundred thousand one thousand and twenty-five six thousand six hundred and seventy-one eight thousand eight hundred and forty-four point four three [ˈbɪljən] [ˈmɪljən] [ˈtrɪljən] [ˈθaʊznd] [ˈhʌndrəd] 0 . 1 3 . 14 4 . 43 zero point one three point one four four point four three Qomolangma 8,844.43 meters high point (eight thousand eight hundred and forty-four point four three) Read small numbers Work on 1a. Match the facts you know. What other geographical facts do you know about these places? What is the biggest desert in the world? What is the deepest salt lake in the world? What is the longest river in the world? What is the highest mountain in the world? 1b.Listen their discussion at the f