A blog about teaching and learning in a maths classroom.

Million, billion, trillion

Thursday, 12 March 2009 | 3 Comments

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Liz on  12 March 09  at  01:42 PM #
i was of the understanding that a billion in australia and england was a million million and that in usa was a thousand million so being a billionaire in america was more common


Simon Job on  13 March 09  at  04:44 AM #
Me too, but it seems that has changed - hence this post. Looking in a couple of Year 7 textbooks: "New Century Maths 7": billion = 1 000 000 000 "MathScape 7": 1 billion = 1 thousand million = 1000000000 So, the text book writers got the memo of the change.
Tim on  14 April 09  at  01:03 PM #
Perhaps this is more of a language issue than a maths issue. My high school dictionary has both definitions of a billion. The foreign language dictionaries I checked only went up to a million.

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Simon Job — eleventh year of teaching maths in a public high school in Western Sydney, Australia.
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