If a student’s calculations are incorrect, he/she will not be able to complete the creative activity that accompanies each of the 25 addition and subtraction worksheets in this lesson unit.

Crack-the-code, number mazes, color shading, and dot-to-dot math problems challenge students to get the answers right the first time.

In one exercise, for example, young mathematicians are posed with 16 different three- and four-digit addition and subtraction problems. Only correct answers correspond with the given letters needed to decode a message.

Math difficulty peaks at 5-digit addition and subtraction problems. An Answer Key is included.