This week we are looking at the Aztec number system. The Aztecs worked with a base-20 system, which means they counted by 20s a lot. We have gotten really good at counting by and working with 10s. To help us understand Aztec numbers, we can also look at counting by 20s.

Check out our introduction to the Aztec number system, then see if you can apply your learning to complete the challenge at the end!

Tomorrow we will be applying our knowledge of < = > and trying some questions with Aztec numbers!