This is a fun worksheet for students working on operations with integers. They must complete the first problem to get the first answer that goes in the shape. Then fill that number into the shape where it is in the next problem. They must keep going in this fashion, completing multiple problems until they get the answer that goes in the STAR. If they did everything correct, they should get the number in the star correct. If they didn't they will have to find their mistake. My students love it because it is a puzzle and they want to get the last number right. I love it because it forces them to find their mistakes. If students are really struggling, I usually give them more hints.