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从右至左，第一个逗点读“thousand”,第二个逗点读“million”,第三个逗点读“billion”;小数点读“point”.读的时候，从左至右，按个十百的方法读，遇到逗点读逗点的读法，小数点后单个单个读。
e.g. 9,600,000 nine million six hundred thousand
8,844.43 eight thousand eight hundred and forty-four point four three
3.I can do it!-Speak the following numbers out loudly.
1,025 6,671 1,235,464 1.63
Step 2 Match the facts you know.
Check the answers,
Read the sentences together,
Explanation
…1,025 meters deep. …1,025米深
… meters deep（ long, wide，high…)
……米深（长，宽，高……)。
英语表示“有多长（宽，高……）”时，一般将数词和数量单位放在表示长宽高的形容词前作状语，即“数词+量词+adj.(长宽高)”。注：面积为in size.
e.g. The building is 20 meters high.
Step 3 Listen and complete the sentences.
Before listening, please guess which words maybe used.
Check the answers.
Language points
Qomolangma is higher than any other mountain in the world.珠穆朗玛峰比世界上其他任何一座山都高。
比较级 + than any other + 单数名词 + 比较范围”
＝“比较级 + than the other + 名词复数 + 比较范围”
都意为“比其他的（任何一个）都要更……”，用比较级的形式表达最高级的含义。
Qomolangma is higher than any other mountain in the world.
＝Qomolangma is higher than the other mountains in the world.
＝Qomolangma is the highest mountain in the world.
Step4 Use the information in 1b to make conversations.
e.g. A:What is the longest river in the world?
B:The Nile.
Step 5
1.Listen and number the facts(1- 4) in the order you hear them.