情景口语：numbers数字a; what’s the area of your country?
B: it’s not very big.
It’s a little over half a million square kilometers.
A; that sounds quite big!
How many people live there?
B; there are about 30 million people in my country.
Most of them live in the north.
A: what’s the average income?
B; that’s the really hard to say.
I think most people earn about two thousand dollars a month, ifyou convert the money from our currency into dollars.
A; so your country is fairly rich.
B: I think we are richer than most countries, but not as rich as countries in western Europe.
Ourbiggest problem at the moment is unemployment, which is roughly 8%.
It has doubled over thelast four years.
A: unemployment in my country is a fraction of that.
Intermediate A: what’s pi?
B: that’s the ratio of the circumference of a circle to its diameter, I think.
A; I see.
What is that ratio exactly?
B: it’s approximately 3.
14, but the number continues forever.
What’s the diameter of your circle?
A: it’s 10 centimeters, so the circumference should be 31.
4 centimeters.
B; ok.
My next problem is to convert 10000 british pounds into us dollars.
What’s the exchangerate at the moment?
A: according to the newspaper, the exchange rate is 1.
85 dollars to the pound.
B: that means that 10.
000 pounds will buy me 18.
500 dollars.
A: what’s the next question.
B; fractions.
What’s a quarter and an eighth?
That’s three-eights.
Easy.
The next question is whatare prime numbers?
.
A: I can help you there.
Those are numbers that cannot be created by multiplying two wholenumbers, apart from the number itself and 1, together.
B; so, 1,2 and 3 are prime numbers, but 4 isn’t because 22=4.
A: exactly.
Anything else?
B; how many seconds in an hour?
60 seconds multiplied by 60 minutes equals 3600 secondsaltogether.
A: you’ll be a mathematician one day.