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 TOPICS This page:   history/biography    Search   Dr. Math See also the Dr. Math FAQ:   Roman numerals Internet Library:   history/biography ELEMENTARY Arithmetic    addition    subtraction    multiplication    division    fractions/decimals Definitions Geometry    2-dimensional      circles      triangles/polygons    3D and higher      polyhedra Golden Ratio/ Fibonacci Sequence History/Biography Measurement    calendars/      dates/time    temperature    terms/units Number Sense/ About Numbers    infinity    large numbers    place value    prime numbers    square roots Projects Puzzles Word Problems Browse Elementary History/Biography Stars indicate particularly interesting answers or good places to begin browsing. Selected answers to common questions:     About Roman numerals. Who Invented the Square Root? [12/11/1996] I've only seen long, stringy roots! Why Is a Circle 360 Degrees? [07/01/1998] Why is a circle defined as 360 degrees? Why is the Word "Number" Abbreviated to "No."? [05/13/2002] Why is the word number abbreviated to no.? Why Use X and Y for Variables? [10/23/2002] Why do we use x and y for variables in an equation? Why Were Fractions Invented? [11/26/2007] An overview of the history of fractions and the purpose they serve. Writing Roman Numerals [11/10/2003] What is the correct way to write the number 3000 in Roman numerals? Can you write the answer as III with the bar over it, meaning (3 * 1000)? Page: [

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