Numbers 0-9 Numbers 10-19 Specialty Numbers It's a base-20 number system By: Henry Jiang and Samantha Fett The Mayan Number System Combind numbers together how can you make 100 using only these numbers? Simple.

What is this? Answer: 100 Judging from what you've seen...

The line above the "shell" figure

represents "5" if you look back at

the chart. Then, the shell itself

represents the number 20. Therefore,

20x5=100!! You could've never known

that the shell is 20 because there is... If there is a "shell" which represents "0" with

another symbol like a "line," then the shell

basically means to multiply your "line" by 20.

For instance....

A SPECIAL RULE! An example....

It was hard to draw...

However, it's supposed to be

3 dots over a "shell." The answer to this question is 60.

Why? It's because the number 3 (the dots)

is multiplied by 20 because of the special

"shell" rule. When there's a zero on the bottom,

multiply by 20! Ok so now that you know how

to count, let's get into the history

of the mayan number system. Q: WHEN WAS THIS USED?! By who?

A: The Mayan number system was

used during the 3rd-4th century B.C. even

though the actual mayans date back

to even 2000 B.C. Only the Mayan

civilization used this system even though

they were the only out of the 5 major indian

groups to understand the concept of zero.

Either other civilizations didn't WANT to

use this system, it was too complicated, or

they have just never heard of it... Bibliography (this is written portion as well)

Websites:

1.http://www.math.wichita.edu/history/topics/num-sys.html#mayan

2.http://library.thinkquest.org/J0112511/mayan_number.htm

3.http://members.tripod.com/~a_sheppard/

4.http://mathcentral.uregina.ca/RR/database/RR.09.00/hubbard1/

5.http://www.latinamericanstudies.org/maya/maya-arithmetic.pdf

Obviously, the Mayans used

this number system. People dont

use it nowadays or people RARELY

use it to be general. However, this

way of doing mathematics has gone

extinct since the Europeans and the

rest of the world invented the actual

numerals and computations...rather

than drawings on stone tablets and

walls. Why is this used? why is it base 20?

People believed that the reason the

Mayans used this system was because

of their weather. They lived in such a

warm area, shoes weren't usually

necessary (that must hurt..). However,

since they didn't wear shoes, they needed

a handy dandy way of counting, in this case

their toes and fingers which just so happen

to add up to...20! We (the people) assume

this is the reason why the Mayans made the

system base 20. How did such an old civilization

create such a sophisticated, creative,

way of counting? First up, the mayan number system is called a vigesimal system

because it is a base 20 number system, rather than a base 10. no

person know exactly WHY the mayans wanted to create a number

system in the first place, but we assume that they needed a solidified

way to count and calculate. after all, the mayans are the people who

accurately counted the number of days in a solar year. they also made

many predictions. however, it is believed that they created the system

for calendar, dates, etc. purposes rather than just plain out calculations.

AND NOW...... Practice problems! We will do problems with mulitplication,

addition, subtraction, AND DIVISION... Addition First... 1. However, this can be re-written as: This is equal to 7+13= 20! BUT WAIT! BUT WAIT...again.. How about horizontal AND verticle addition?

Of course there's a way of doing it... Wow..this looks familiar..JUST WRITE IT

HORIZONTALLY/VERTICALLY! Now for subraction! Our beautiful presenter will explain these...although it

is quite simple for our HONORS class of course.. BUT WAIT! Yay! Multiplication time! The Mayans incorporate multiplication

into many things because it is a base 20

system, but we (samantha and I) won't go

deep into the multiplication process because

of its deep complexity. It's too much for a

short presentation like this, but...they have

multiplication tables too! Here's a basic question..Multiplication is

completely possible using the Mayan system. Division is possible as well, it's just

the same way we do in math, but with

symbols. Long division is possible

as well but once again, it

will take too long to explain

and we are limited on time.. Fun Facts!

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# Mayan Project

The Mayan Number System and MATH!

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