Napier's Bones
They were popular around the world for hundreds of years.
Napier's Bones are the best known of the Maths Devices that John Napier Developed.
You can multiply and divide very large numbers, and even find square roots and cube roots without using a calculator!!!
You do not need to know your tables to use Napier's Bones.
A Cunning Plan
1 Have a look at the short introduction videos.
Napier's Bones Videos
2 Print out some 'Bones' to build, or the simpler Napier's Bones Strips.
Print Napier's Bones
Napier's Bones Multi-Line Examples
Using Grid Without Bones Examples
Napier's Bones Single Line Examples
3 Try the examples, Don't worry you can always 'See Spike Do Them'.