num_pages: 64
description: Brief discussions of the duodecimal, the hexadecimal, and the binary number systems accompany directions for creating an ingenious machine for adding and subtracting that uses egg cartons and marbles
language: English
title: How to Make an Adding Machine that Even Adds Roman Numerals
titlecomplete: How to Make an Adding Machine that Even Adds Roman Numerals
ratings_count: 1
publisher: Harcourt