# Amazing Race Round 2

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• The Aztecs: Keeping up with Life Allison Marquez Pink
• Well, I know a few things about their calendar and number system, but that's about it.
• Cool! Let's hear it!
• Hello Amy! What do you know about the Aztec Indians?
• The numbers in the number system were represented by dots, bars, and symbols.
• What did the numbers look like?
• Did every number have its own symbol?
• The numbers 1 through 4 were represented by dots, a bar represented the number 5, and other specific numbers were represented by a variety of symbols. Not every number had its own symbol, so many numbers could be made with different combinations of symbols.
• Are there any questions?
• There was no zero in the Aztec number system.
• Hey Kim, I got to go to this awesome museum where I learned about the aztec number system. One thing I learned was that the shell representing 20 was adopted from the Olmec number system, where it represented 0.
• Well, research shows that they had a basic understanding of it, but they just didn't have a symbol for it.
• That's really cool Anna! I have one question. Did the Aztecs even know what zero was?
• Did you know that not everyone used to use the same numbers and calendar? Most cultures, like the Aztecs, had their own unique number systems and calendars that helped them communicate quantities and keep track of time.
• The calendar was a massive stone carving.
• Oh, hi there Katie! How was your trip Mexico?
• It was awesome! I went to on this tour where we went to see different Aztec artifacts. I got to see the ancient Aztec Calendar, and I learned that It worked like a gear, with the 20 signs and 13 numbers creating different combinations.
• Sources- - https://www.math.temple.edu/~zit/Native%20America n/9%20Aztecs_num.pdf - https://prezi.com/lcvpes3cxbh1/aztec-number-sys tem/
• The calendar was called Tonalpohualli.
• What did I miss while I was on my trip?
• Wow! I guess I really missed a lot! Was there anything you guys went over that I need to know about?
• Well, in history, we started studying the culture of the Aztec indians. We started working on a  project about their calendar.
• Sources-  - http://youngzones.org/ElaineTAMUCC/FMN/Aztec_num ber.html - https://www.math.temple.edu/~zit/Native%20America n/9%20Aztecs_num.pdf
• Conclusion
• Hello Jean! What are you doing at the library today?
• Aw man! But, maybe I could help you. I just happened to be doing some research of my own, and you wouldn't believe the cool things I found!
• Well, I was planning on doing some research on the Aztec calendar and number system., but I can't seem to find the book I need.
• Sources-  - https://www.ancient.eu/article/896/the-aztec-calen dar/ - https://www.azteccalendar.com/azteccalendar.html
• That's cool! In school we learned that it looked like a large, stone circle with the symbols carved into it. The teacher told us that it looked like a gear, too.
• Sources- - www.aztec-history.com/aztec-calendar-stone.html - https://www.ancient.eu/article/896/the-aztec-calen dar/
• Mrs. Brown told us that the calendar had 260 days that were divided into 20 day periods called Trecenas. She also told us that all of the days, weeks, and years were divided equally among the Aztec gods, because they were very religious.
• The Aztecs had very advanced ways of keeping up with their lives. Their number system helped them communicate values. It used symbols, and it didn't have a zero. The Aztec calendar helped them keep track of time. It was a large stone carving, and it was called Tonalpohualli.
• I would love your help! Let's go now!
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