The Mayans had an interesting number system with a base 5 within a base 20. Enter a number from 1 to 99999 to see how the Mayans would have written it, or enter a number to count with. Enter number: every How Mayan numbers worked. The Mayan. but then it became harder to draw. The Mayan system is quick to write, and simple to understand.

Very late to the party on this one, but I wrote the following helper class recently for a project at work. It was designed to convert short strings into numbers and back again (a simplistic perfect hash function), however it will also perform number conversion between arbitrary bases. The Base10ToString method implementation answers the question that was originally posted.

Denise Schmandt-Besserat HomePage, How Writing Came About, University of Texas Press, 1996, ISBN 0-292-77704-3. Georges Ifrah. The Universal History of Numbers: From Prehistory to the Invention of the Computer, Wiley, 2000. ISBN 0-471-37568-3.

This function takes in any base-10 integer and returns the string representation of that number in its specified base-n form. Up to base-36 is supported without special notation for symbolizing when a number is really in a single digit position. When that does occur, the number that takes up that single base is surrounded by parantheses.

How to count with tens and ones Any two-digit number can be shown using tens and ones. For example, the number 34 can be divided into three lots of ten and four lots of one.

To convert from base 10 to base 2, 8, or 16 use the subtraction method. Write the place values (of the base you are converting to) in a table. Write down the decimal number to be converted with space belowit for the subtractions. Find the largest new place value that you can subtract from the decimal number.

Provide students with two more three-digit numbers. Write down the following steps on the whiteboard: Write the number down on the place value mat. Sketch the number using base-ten blocks or create the number using base-ten blocks. Write the number in written form. Remind students to use the anchor chart for support.