This activity accompanies a PowerPoint lesson I have uploaded. Cut out these puzzles and lay them around the room. Students will rotate through 8 stations to fill in missing numbers on 100's Chart puzzle pieces. This download also includes an worksheet with 4 puzzles for students to do independently. This was designed for 2nd grade but this could be used for 1st as well and for 3rd as a review of concepts of the 100's chart.