Thursday, 12 March 2009 | 3 Comments
I used to think that I knew what 1 billion was, i.e. 1 000 000 000 000. Then a couple of years ago, I looked on Wikipedia and found there were two defintions: Long and short scales.
It seems that changes in the way Australia defines one billion have only occurred relatively recently (quoting Wikipedia)
As of 1999, the Australian Government’s financial department did not consider short scale to be standard, but used it occasionally. The current recommendation by the Australian Department of Finance and Administration (formerly known as AusInfo), and the legal definition, is the short scale.
According to the Metric Conversion page from the National Measurement Institute:
Common usage in Australia (AS/NZX 1376:1996 Conversion Factors, p31) is that:
- million = 106 (i.e. 1 000 000)
- billion = 109 (i.e. 1 000 000 000)
- trillion = 1012 (i.e. 1 000 000 000 000)
- quadrillion = 1015 (i.e. 1 000 000 000 000 000)
So, it seems that Australia does follow the short scale.
Now that we’ve sorted that out… here are some helpful photos found on the web for understanding large numbers.
Click through both photos for a better version.
A couple of notes:
Simon Job — ninth year of teaching maths in a public high school in Western Sydney, Australia.
MathsClass is about teaching and learning in a maths classroom. more→
Mathematics activities | CSIRO
[Repost] Caesar Cipher | Solve My Maths
programming cipher code maths
Resourceaholic: Ideas for Teaching Circle Theorems
circles maths theorem
python latex programming maths
MathFu: Main Page
maths programming c++