The concept is simple: add two adjacent hexagons to find the sum and fill in the hexagon ABOVE them, and subtract two adjacent hexagons to fill in the difference in the hexagon BELOW them! Sounds easy, right?

Well, maybe not: it's not like you can just start in the middle row and move up and down: to solve it, you have to locate the right place to start, which may be a row up or down, or near the top or bottom. As you fill in each of the solutions, more and more clues emerge, and eventually the puzzle "solves itself." But not before your students have had a good logical and computational workout! Sure beats those lousy "practice sheets" that came with the awful math curriculum your district bought last year (how are those trainings coming, btw?)

There are 44 different cards in this set, as well as an answer sheets, so you can re-use the cards year after year: just laminate them, put them in a box, and your students can do them in any order they want - there's a space on the answer sheet to write down which puzzle they are solving.

I've also included a "diy" sheet with blank hexagons, so that your students can make some puzzle of their own and share them with the class!