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Napier's Bones: Quickly Multiply, Wooden Style

Step 6Pencil in the Numbers

Pencil in the Numbers
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Now it's time to enter the numbers.

Don't draw any numbers on the 3.5" small piece. This piece will remain unmarked.

On the 9" piece with only horizontal lines on one side, write the numbers 2 through 0 (2,3,4.....,9,0), one in each 'box', in that order.

Take one of the remaining 9" pieces and draw the number 2 in the top box on one side. Turn the piece 90 degrees and draw the number 3 in the top box on that side. Repeat with 4 and 5 and the remaining two sides.

Repeat these exact steps with another 9" piece.

For the last two remaining 9" pieces, replicate the process with the numbers 6, 7, 8, and 9.

Take one of the [2,3,4,5] pieces and place it on the table with the 2 facing up. Place the first (fixed) piece (the one with only horizontal lines on one side) next to this piece, but offset so that the 2 on the fixed piece is aligned next to the highest empty box.

In that empty box, write in the two digit result of 2 x 2 (the upper number times the number on the left). Since the answer is 04, write the 0 on the left side of the diagonal and the 4 on the right side. In the next box, write the answer to 2 x 3 (the upper number times the number on the left) in the same fashion. Repeat this pattern for all of the numbers.
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1 comment
May 16, 2010. 11:25 PMscrollsawcharlie says:
 I love this kind of stuff , Thank you, now am off to the shop to build my own

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