These are a set of 20 different "addition tower" puzzles where students place digits on 4 different addition towers to get the correct sum for each tower. This is designed for students who are just beginning to add more than two numbers together, so the first set uses only the digits 1 - 6 twice (that is, 2 1's, 2 2's, etc.) The second set of ten puzzles uses the digits 2 - 7 twice.
What's good about this setup is that you can cut out a set of cards and leave them at a math station for students to work on independently. When they finish each puzzle, they can record their solutions on an answer sheet. The puzzles can be done in any order they like.
There is also a "DIY" set of puzzles so students can make up their own and share with one another.