(
课件网) Unit 1 The Changing World Topic 2 The population in developing countries is growing faster. Section B 30 thirty 40 forty 90 ninety twenty 20 50 60 70 80 fifty sixty seventy eighty Review（说出下列数字的英文表达） Lead in two thousand and eight Olympic Games Can you read the following numbers correctly Lead in Can you read the following numbers correctly nine billion, sixty million, twenty thousand, one hundred and four 9060020104 9060020104 Lead in How to read numbers 3.14 100 2,000 3,000,000 4,000,000,000 three point one four one hundred two thousand three million four billion 119 367 589 one hundred and nineteen three hundred and sixty-seven five hundred and eighty-nine Review（说出下列数字的英文表达） 543.7 1 562 3 980 five hundred and forty-three point seven one thousand, five hundred and sixty-two three thousand, nine hundred and eighty Review（说出下列数字的英文表达） ， ， thousand 1,000,000,000 one billion / b lj n / 十亿 1,000,000 one million / m lj n / 一百万 1,000 one thousand 100 one hundred Look, read and learn 说出下列数字的英文表达 3.14 Look, read and learn 说出下列数字的英文表达 point 点 three point one four 20.56 twenty point five six 78.72 seventy-eight point seven two Lead in How to read numbers First, try to separate the number in groups of three from right to left. Then read it in order from billion to million and thousand. 1 0 0 1 0 0 1 0 0 1 1 , 0 0 1 , 0 0 1 , 0 0 1 thousand million billion one billion, one million, one thousand and one Lead in Listen, read and learn 543.7 1 562 6 004 001 7 198 764 502 P12 five hundred and forty-three point seven one thousand, five hundred and sixty-two six million, four thousand and one seven billion, one hundred and ninety-eight million, seven hundred and sixty-four thousand, five hundred and two Lead in Have a try 973 3 980 98 721 768 540 P12 nine hundred and seventy-three three thousand, nine hundred and eighty ninety-eight thousand, seven hundred and twenty-one seven hundred and sixty-eight thousand, five hundred and forty 973 3 980 98 721 768 540 nine hundred and seventy-three three thousand, nine hundred and eighty seven hundred and sixty-eight thousand, five hundred and forty ninety-eight thousand, seven hundred and twenty-one Have a try Listen to 1a and match the information. 1. the world 2. China 3. India 4. the USA A. 309 million B. 6.8 billion C. 1.3 billion D. 1.1 billion Brain storm Please say out the words about numbers in English. 百 hundred 千 thousand 百万 milliom 十亿 billiom Observe the numbers and tell the rules. 973 nine hundred and seventy-three 3 980 three thousand , nine hundred and eighty 98 721 ninety-eight thousand , seven hundred and twenty-one 768 540 seven hundred and sixty-eight thousand , five hundred and forty carry out 实行，进行，执行。 e.g. It won’t be an easy plan to carry out. 那并不是一个容易实施的计划。 e.g. This is a new policy, and they will carry it out next year. 这是一项新政策， ... ...
