These are integer addition task cards / activity sheets in a puzzle type format. There are 4 different cards or sheets that generally increase in difficulty. This activity make for great practice with Integer addition, and I have found that the pyramid format invites students to slow down, reflect, and make sense of their work. This is primarily because they start to realize that one result influence the next, and the next, and so forth....because a pyramids foundation supports it upper levels all the way to the tip.