Goal: to find a Numskill "set" of 3 cards. A Numskill set is made up of three cards that contain a number bond and 3 different colors. In a number bond, the three numbers "go together". The numbers 4, 5, and 1 make up a number bond because 4+1=5, 5-1=4, and 5-4=1.

number bonds Math game greg tang math