A two-page A4 worksheet on Maya numerals and base 20 for ages 9 to 14.

Page 1: students convert 12 numbers (for example 125, 276 and 2026) to pure base 20, writing each place with modern digits, with space to show their working.

Page 2: a separate answer key with the answer to every exercise.

Ready to print, with no preparation needed. It works well alongside place value lessons, as a history-of-maths starter or as a comparison with our own base 10. It pairs with the free interactive Mayan numeral converter on Goofer Games, which shows each number as dots, bars and the shell sign for zero.