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.
Read More
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.
Read Less
Add this copy of How to Make an Adding Machine That Even Adds Roman to cart. $50.10, good condition, Sold by Bonita rated 4.0 out of 5 stars, ships from Newport Coast, CA, UNITED STATES, published 1979 by Harcourt.
