I use these cards as a place value review center. I usually print them out on cardstock and laminate them, and then you may set up the center however you wish!
Example: After cutting and laminating, I put magnets on the backs of the place value cards (“ones, tens, etc”) and place them on a magnetic surface (white board, long baking sheet, easel). I will say a number out loud, and the students will place the correct numbers either underneath or right on top of the place value cards. This is just one activity that could be done with these!