Napier's Bones are a simple multiplication calculator invented by John Napier in the 16th century.
| Version | 5 |
|---|---|
| Works with | Sugar: 0.98 – 0.98 |
| Updated | October 26, 2012 |
| Developers | Walter, Ignacio |
| Homepage | http://en.wikipedia.org/wiki/Napier%27s_bones |
| Rating | Not yet rated |
| Downloads | 2,440 |
More about this activity
You can use Napier's Bones to multiple any multi-digit number by a single digit number (1-9):
1. Add bones for each digit in your multi-digit factor.
2. Move the mouse over the row that represents your single-digit factor.
3. Read the results from left to right in the red ovals. (If two numbers appear in an oval, add them. If they sum to greater than 10, carry to the left.)
Developer Comments
I still need to add 'design your own bone'.
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Release Notes
5
GTK-3 port by Ignacio Rodriguez
NOTE: This is for Sugar 0.98+ only
