**By Eric Charlesworth**

### Product Description:

Four independent activity sheets that target this key math skill and are self-checking! Perfect for homework, centers, extra credit, or any time!

## Teaching Tip:

Bonus Challenge Problem: The bottom of the page features a “Triple Match Challenge,” which offers students a more difficult problem to solve. The answer to this problem will match up with two other answers on the page, so students can check their work!

### Grades 2-3