The card note says 1+2=? 2+3=? Wait, make the card paper into a circle, and then make it look like a pair of gloves (you can cut out two hand shapes from cardboard or directly match something in the white gloves to make an upright hand). Each finger is written with one of the numbers 1- 10. Children can find the answer with those rings with arithmetic problems and put the ring on one of the fingers.