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:
New Subscribe to the …MathsLinks
Simon Job — eleventh year of teaching maths in a public high school in Western Sydney, Australia.
MathsClass is about teaching and learning in a maths classroom. more→
Sarah Carter on Twitter: "Spent some time Americanizing this resource from @MathsPadNicola. Already paid off in an awesome way. A student came to get today's work bec… https://t.co/TqzI6sbA8A"
maths graphing straight-line-graphs
Show It...Draw It! on the App Store
maths ios app concrete-representational-abstract cra
Square Match Puzzle - YouTube
maths pattern curiousityshow