I have students take turns and choose a strip. I then have them read the equation and then answer with the sum. They then place it on the Bumblebee that has the correct sum.
You can purchase this center from my store. It is very simple to prep, just print out the pages (you can choose color or black and white) and cut out the strips and then if you want you can laminate both the Bumble bee pages and the strips. You can also add velcro to the strips and the bee if you'd like.
I hope you enjoy them.