Synopsis
Shows how to use the open-end abacus. Discusses the history of the decimal number system and principles of its use, such as grouping in addition, regrouping in subtraction and comparison of number values.
Uploader's description on archive.org
Details
- Running time
- 10 minutes
- Collection
- Ephemeral Films
Subjects on the Internet Archive
- abacus
- computation
Reviews on the Internet Archive
★★★★ · Or just use a calculator and get it over with. · Spuzz · 2017-05-08
Fun film about the pre-calculator. the abacus! The film shows its usage and it's methods of use. It's so straightforward, anyone could understand.. so this film works!