Add some fun to your addition and Making 10 units with these great supplemental activities. I've included an addition Count the Room as well as a making 10 Count the Room activity. For your math centers or a small group activity, the addition Flip and Add activity is a lot of fun! Also included is a Make 10 match printable, where students need to match the ten-frames to make 10. The answer keys are included for easy correcting.