How to make an adding machine that even adds Roman numerals
By: by Lee Goeller ; illustrated by Kiyo Komoda.
Contributors: Komoda, Kiyoaki.
Edition: 1st ed.
Publisher: Harcourt Brace Jovanovich
Published: 1979
Place of publication: New York
Language: eng
Number of pages: 64
Subjects: Calculators -- Juvenile literature.; Calculators -- Problems, exercises, etc.
Description: Instructions for making a "machine" of egg cartons and marbles and for using it to add and subtract numbers of various bases and also Roman numerals.