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The Aztecs made advances in art, architecture and astronomy. it would be A
A major accomplishment of the Aztec Empire is that the Aztecs developed symbols for numbers, which they used to preform calculations.
The Aztecs used a vigesimal (base 20) number system. The numbers were represented by dots, bars, rhombuses, and other symbols. The Aztec were very exact with their measurements. Their writing was based on Egyiptian hieroglyphics, so they were not the first civilization to develop them.