What's new

slide rule posts

Napier’s bones Activity

by David Shaw, 18 June 2013 | 0 comments

four strips of paper with numbers on them. The top number on each strip is highlighted - 4, 6, 7, 0

How did people multiply before calculators were invented? You could try doing it in your head, but you could also use a mechanical calculator, such as this set of Napier’s bones.

Continue reading Napier’s bones

Categories:

Double helix cover

Double Helix

If you're after more activities for kids sign up today!