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een fifteen sixteen seventeen eighteen nieen twenty eleventh twelfth thirteenth fourteenth fifteenth sixteenth seventeenth eighteenth nieenth twentieth 基數(shù)詞 序數(shù)詞 twentyone thirty forty fifty sixty seventy eighty niy one hundred twentyfirst thirtieth fortieth fiftieth sixtieth seventieth eightieth niieth one hundredth 基數(shù)詞 序數(shù)詞 基變序,很容易; 1,2,3 特殊記 。 3. Red Square in Moscow is about 91,000 square metres in size. 莫斯科的紅場面積大約 91,000平方米。How old are you? How many family members are there in your family? How many students are there in your class? What’s your favourite number? What is your telephone number? Talking about numbers freely. What number is it like? It looks like a ‘zero’. 100 one hundred 200 two hundred 1,000 one thousand 3,000 three thousand 1,000,000 one million 4,000,000 four million 1,000,000,000 one billion The CN Tower is over 1,500 feet tall. over prep. 超過 foot n. 足 。 2.