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Mayan Technology
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These are Mayan numbers, 0 - 20.
Numbers were written from bottom to top. Below you can see how the number 32 was written:
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It was very easy to add and subtract using this number system, but they did not use fractions. Here's an example of a simple addition:
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400's |
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20's |
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= |
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1's |
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9449 |
+ |
10425 |
= |
19874 |