Which component was NOT part of the Aztec number system?

The Aztec number system was primarily based on a vigesimal (base-20) structure and included various components that facilitated mathematical operations and daily calculations. While addition and subtraction were integral to their counting methods, and the use of symbols for numbers is a foundational aspect of any number system, the incorporation of calendric calculations was also significant due to the importance of astronomy and timekeeping in Aztec society.

However, multiplication tables as a formalized component were not a part of the Aztec number system. Instead, they employed more direct methods for multiplication by repeated addition, rather than having established tables that laid out multiplication results in a systematic way. This approach reflects the practical needs of their society rather than formal mathematical abstraction.