In this math worksheet, students solve 25 basic addition facts below 20. Using the sums and the key to the code, students decipher a secret message about basketball.

In this math worksheet, students solve 50 basic addition facts below 20. Using the sums and the key, students decipher the secret message about Abraham Lincoln.

For this math worksheet, students solve 15 basic addition facts with sums up to 20. Using the answers and the code key, students decipher the secret message about Chinese New Year.

Use the diagram on this one page website to solve the problem. There are teacher notes and the solution is only a click away.